18386

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)} T(n-k, k), T given by A026692.at n=19A026702
• Numbers n such that 215*2^n-1 is prime.at n=23A050859
• Diagonal sums of number triangle A122919.at n=9A122920
• G.f.: exp( Sum_{n>=1} [Sum_{k=0..2n} C(2n,k)^2*y^k]*x^n/n ) = Sum_{n>=0,k=0..2n} T(n,k)*x^n*y^k, as a triangle of coefficients T(n,k) read by rows.at n=29A181145
• G.f.: exp( Sum_{n>=1} [Sum_{k=0..2n} C(2n,k)^2*y^k]*x^n/n ) = Sum_{n>=0,k=0..2n} T(n,k)*x^n*y^k, as a triangle of coefficients T(n,k) read by rows.at n=31A181145
• Numbers n such that n!8+1 is prime (for n!8 see A114800).at n=43A204661
• Bernoulli number B_{n} has denominator 354.at n=43A255684
• Least index a(n) such that the sequences b(n,m) from A334539 are purely periodic after a(n).at n=26A335296
• Consecutive states of the linear congruential pseudo-random number generator 172*s mod 30307 when started at s=1.at n=35A385032