478170

Appears in sequences

• Expansion of Product_{k>=1} (1 - x^k)^21.at n=23A010827
• a(n) = (11*n+5)*(n+4)*(n+3)*(n+2)*(n+1)/120.at n=20A056118
• Numbers k such that 4*k-1, 8*k-1, 16*k-1, 32*k-1 and 64*k-1 are all primes.at n=16A101994
• Triangle read by rows: T(n,k) is the number of non-crossing connected graphs on n nodes on a circle having root (a distinguished node) of degree 1 and having k edges (n >= 2, 1 <= k <= 2n-4).at n=67A143024
• a(n) = 332640*4^n*Gamma(n + 1/2)/(sqrt(Pi)*Gamma(n + 7)); super ballot numbers, row 5 of A135573.at n=14A348899