Sequences
392,541 sequences
- Graham-Sloane-type lower bound on the size of a ternary (n,3,3) constant-weight code.A030511
Graham-Sloane-type lower bound on the size of a ternary (n,3,3) constant-weight code.
- Concatenation of first n 2-digit positive integers including leading zeros.A030512
Concatenation of first n 2-digit positive integers including leading zeros.
- Numbers with 4 divisors.A030513
Numbers with 4 divisors.
- a(n) = prime(n)^4.A030514
a(n) = prime(n)^4.
- Numbers with exactly 6 divisors.A030515
Numbers with exactly 6 divisors.
- Numbers with 7 divisors. 6th powers of primes.A030516
Numbers with 7 divisors. 6th powers of primes.
- Number of walks of length n between two vertices on an icosahedron at distance 1.A030517
Number of walks of length n between two vertices on an icosahedron at distance 1.
- Number of walks of length n between two vertices on an icosahedron at distance 2.A030518
Number of walks of length n between two vertices on an icosahedron at distance 2.
- Number of polyhexes of class PF2 with four catafusenes annealated to pyrene.A030519
Number of polyhexes of class PF2 with four catafusenes annealated to pyrene.
- Number of polyhexes of class PF2 with C_{2n} symmetry.A030520
Number of polyhexes of class PF2 with C_{2n} symmetry.
- Product of first n palindromic primes plus 1.A030521
Product of first n palindromic primes plus 1.
- Product of first n palindromic primes minus 1.A030522
Product of first n palindromic primes minus 1.
- A convolution triangle of numbers obtained from A001792.A030523
A convolution triangle of numbers obtained from A001792.
- A convolution triangle of numbers obtained from A036068.A030524
A convolution triangle of numbers obtained from A036068.
- Number of polyhexes of class PF2 with a particular symmetry.A030525
Number of polyhexes of class PF2 with a particular symmetry.
- A convolution triangle of numbers obtained from A036070.A030526
A convolution triangle of numbers obtained from A036070.
- A convolution triangle of numbers obtained from A036083.A030527
A convolution triangle of numbers obtained from A036083.
- Triangle read by rows: T(n,k) = binomial(k,n-k).A030528
Triangle read by rows: T(n,k) = binomial(k,n-k).
- Number of polyhexes of class PF2 with a particular symmetry.A030529
Number of polyhexes of class PF2 with a particular symmetry.
- n appears A070939(n) times.A030530
n appears A070939(n) times.
- Value of 3^x - 2^x - 5 for the solutions of 3^x - 2^x == 5 (mod 7).A030531
Value of 3^x - 2^x - 5 for the solutions of 3^x - 2^x == 5 (mod 7).
- Number of polyhexes of class PF2 with symmetry point group C_s.A030532
Number of polyhexes of class PF2 with symmetry point group C_s.
- Expansion of Molien series for 4-D extraspecial group 2^{1+2*2}.A030533
Expansion of Molien series for 4-D extraspecial group 2^{1+2*2}.
- Number of polyhexes of class PF2.A030534
Number of polyhexes of class PF2.
- Expansion of Molien series for 16-D extraspecial group 2^{1+2*4}.A030535
Expansion of Molien series for 16-D extraspecial group 2^{1+2*4}.
- Expansion of Molien series for 32-D extraspecial group 2^{1+2*5}.A030536
Expansion of Molien series for 32-D extraspecial group 2^{1+2*5}.
- Expansion of Molien series for 64-D extraspecial group 2^{1+2*6}.A030537
Expansion of Molien series for 64-D extraspecial group 2^{1+2*6}.
- (2^n+2)*(2^n+4)*(4^n+9*2^n+38)/720.A030538
(2^n+2)*(2^n+4)*(4^n+9*2^n+38)/720.
- (2^n+1)*(2^n+2)*(2^n+4)*(2^n+6)*(4^n+15*2^n+176)/8!.A030539
(2^n+1)*(2^n+2)*(2^n+4)*(2^n+6)*(4^n+15*2^n+176)/8!.
- Largest n-digit norep emirp.A030540
Largest n-digit norep emirp.
- Remainder-numerators from Egyptian fraction expansion of 2/588391 using odd greedy algorithm.A030541
Remainder-numerators from Egyptian fraction expansion of 2/588391 using odd greedy algorithm.
- Remainder-numerators from Egyptian fraction expansion of 4/538199 using odd greedy algorithm.A030542
Remainder-numerators from Egyptian fraction expansion of 4/538199 using odd greedy algorithm.
- Remainder-numerators from Egyptian fraction expansion of 3/46547 using odd greedy algorithm.A030543
Remainder-numerators from Egyptian fraction expansion of 3/46547 using odd greedy algorithm.
- Remainder-numerators from Egyptian fraction expansion of 2/24631 using odd greedy algorithm.A030544
Remainder-numerators from Egyptian fraction expansion of 2/24631 using odd greedy algorithm.
- Remainder-numerators from Egyptian fraction expansion of 6/104651 using odd greedy algorithm.A030545
Remainder-numerators from Egyptian fraction expansion of 6/104651 using odd greedy algorithm.
- Remainder-numerators from Egyptian fraction expansion of 5/5809 using odd greedy algorithm.A030546
Remainder-numerators from Egyptian fraction expansion of 5/5809 using odd greedy algorithm.
- Number of terms (including the initial term) needed to reach a palindrome when the Reverse Then Add! map (x -> x + (x-with-digits-reversed)) is repeatedly applied to n, or -1 if a palindrome is never reached.A030547
Number of terms (including the initial term) needed to reach a palindrome when the Reverse Then Add! map (x -> x + (x-with-digits-reversed)) is repeatedly applied to n, or -1 if a palindrome is never reached.
- Write n in base 6 and juxtapose.A030548
Write n in base 6 and juxtapose.
- Position of n-th 0 in A030548.A030549
Position of n-th 0 in A030548.
- Position of n-th 1 in A030548.A030550
Position of n-th 1 in A030548.
- Position of n-th 2 in A030548.A030551
Position of n-th 2 in A030548.
- Position of n-th 3 in A030548.A030552
Position of n-th 3 in A030548.
- Position of n-th 4 in A030548.A030553
Position of n-th 4 in A030548.
- Position of n-th 5 in A030548.A030554
Position of n-th 5 in A030548.
- a(n)=least k such that base 6 representation of n begins at s(k), where s=A030548.A030555
a(n)=least k such that base 6 representation of n begins at s(k), where s=A030548.
- run length of n-th run of digit 0 in A030548.A030556
run length of n-th run of digit 0 in A030548.
- Length of n-th run of digit 1 in A030548.A030557
Length of n-th run of digit 1 in A030548.
- Length of n-th run of digit 2 in A030548.A030558
Length of n-th run of digit 2 in A030548.
- Length of n-th run of digit 3 in A030548.A030559
Length of n-th run of digit 3 in A030548.
- Length of n-th run of digit 4 in A030548.A030560
Length of n-th run of digit 4 in A030548.