Sequences

Primes that are concatenations of two consecutive primes.

Palindromic prime concatenated with next palindromic prime is a prime.

Previous palindromic prime concatenated with this palindromic prime is prime.

Primes that are the concatenation of two consecutive palindromic primes.

Numbers k such that k concatenated with k+1 is a square.

Squares that are concatenations of two consecutive nonzero numbers.

Numbers k such that k^2 is a concatenation of two successive numbers.

Primes which when concatenated with next two primes are also prime.

Primes which are concatenations of three consecutive primes.

Numbers k such that k concatenated with k+1, k+2, k+3 is prime.

Primes which are concatenations of four consecutive numbers.

Primes which when concatenated with next 3 primes are also prime.

Primes which are concatenations of 4 consecutive primes.

n does not have the property that all even digits occur together and all odd digits occur together.

Primes with property that all even digits occur together and all odd digits occur together.

Squares with property that all even digits occur together and all odd digits occur together.

Numbers k such that k^2 has property that all even digits occur together and all odd digits occur together.

Numbers k such that k^3 has property that all even digits occur together and all odd digits occur together.

Cubes with property that all even digits occur together and all odd digits occur together.

Primes with property that when squared all even digits occur together and all odd digits occur together.

Squares of primes, with property that all even digits occur together and all odd digits occur together.

Primes with property that when cubed all even digits occur together and all odd digits occur together.

Cubes of primes, with property that all even digits occur together and all odd digits occur together.

Squares composed of digits {2,5,6}.

Squares composed of digits {2, 5, 7}.

When squared gives number composed of digits {2,5,6}.

When squared gives number composed of digits {2, 5, 7}.

Position of n-th 1 in A030298.

Position of n-th 2 in A030298.

Position of n-th 3 in A030298.

Position of n-th 4 in A030298.

Position of n-th 5 in A030298.

n-th partial sum of A030298.

If n is even, 2(n/2 + 1)! - 1; if n is odd, ((n + 1)/2 + 1)! - 1.

a(n) = (n+1)! + n.

Permutations of 1,2,...,n for n=1,2,3,..., arranged antilexicographically.

Position of n-th 1 in A030496.

Position of n-th 2 in A030496.

Position of n-th 3 in A030496.

Position of n-th 4 in A030496.

Position of n-th 5 in A030496.

n-th partial sum of A030496.

Graham-Sloane-type lower bound on the size of a ternary (n,3,3) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,4) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,5) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,6) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,7) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,8) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,9) constant-weight code.

Graham-Sloane-type lower bound on the size of a ternary (n,3,10) constant-weight code.