Sequences

Coordination sequence T4 for Zeolite Code SBS.

Coordination sequence T1 for Zeolite Code SBT.

Coordination sequence T2 for Zeolite Code SBT.

Coordination sequence T3 for Zeolite Code SBT.

Coordination sequence T4 for Zeolite Code SBT.

Coordination sequence T1 for Zeolite Code TSC.

Coordination sequence T2 for Zeolite Code TSC.

Number of ways n-th repdigit number, A010785(n), can be expressed as a polygonal number.

Undulating numbers (of form abababab... in base 10).

Numbers all of whose prime factors are palindromes.

Numbers k such that k-1 is a palindrome in base 10, and k+1 is a palindrome in base 17.

Good sequence of increments for Shell sort (best on big values).

Grundy function for turn-at-most-4-coins game.

Primes and gaps for the first 20 distinct consecutive gaps.

Primes and gaps for the first 10 increasing consecutive gaps.

Primes and gaps for the first 11 decreasing consecutive gaps.

0-additive sequence: not the sum of any previous pair.

Numbers that are in both the 1-additive and 0-additive sequences (A002858 and A033627).

Numbers that are not the sum of two distinct Ulam numbers.

Number of partitions of n into distinct divisors of n.

Numbers k such that sigma(phi(k)) = sigma(k) where sigma is the sum of divisors function A000203 and phi is the Euler totient function A000010.

Numbers k such that sigma(phi(k)) = phi(sigma(k)).

a(n) = n-th prime modulo 19.

OddPowerSigma(n) = sum of odd power divisors of n.

Square-root-perfect numbers: srsigma(n)=m*n^(1/2) for some integer m.

a(n) = (n-1)! * Product_{i=1..n-1} ((2*n)!-2*i-1).

Products of partition numbers A000041(n).

Quarter-squares plus 1 (that is, a(n) = A002620(n) + 1).

Base-2 digital convolution sequence.

Base 3 digital convolution sequence.

Base 4 digital convolution sequence.

Base 5 digital convolution sequence.

Base 6 digital convolution sequence.

Base 7 digital convolution sequence.

Base 8 digital convolution sequence.

Base 9 digital convolution sequence.

Base 10 digital convolution sequence.

Trajectory of 3 under map x->x + (x-with-digits-reversed).

Trajectory of 5 under map x->x + (x-with-digits-reversed).

Trajectory of 7 under map x --> x + (x-with-digits-reversed).

Trajectory of 9 under map x->x + (x-with-digits-reversed).

Trajectory of 13 under map x->x + (x-with-digits-reversed).

Trajectory of 15 under map x->x + (x-with-digits-reversed).

Trajectory of 17 under map x->x + (x-with-digits-reversed).

Trajectory of 19 under map x->x + (x-with-digits-reversed).

Trajectory of 21 under map x->x + (x-with-digits-reversed).

Trajectory of 23 under map x->x + (x-with-digits-reversed).

Trajectory of 25 under map x->x + (x-with-digits-reversed).

Trajectory of 27 under map x->x + (x-with-digits-reversed).

Trajectory of 29 under map x->x + (x-with-digits-reversed).