53347

Appears in sequences

• Numbers k such that 2^(2k-1) + 2^k + 1 is prime.at n=15A108062
• Wiener index of a benzenoid consisting of a zig-zag chain of n hexagons (s=13; see the Gutman et al. reference).at n=20A193393
• E.g.f.: exp( Sum_{n>=1} A000041(n)*x^n/n ), where A000041(n) is the number of partitions of n.at n=7A215915
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f.: exp(Sum_{j>=1} j^(k-1)*A000041(j)*x^j).at n=35A293796
• Expansion of (1/x) * Series_Reversion( x/(1+7*x+9*x^2) ).at n=5A386362
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where A(n,k) = Sum_{j=0..n} k^j * binomial(n,j) * Catalan(j+1).at n=41A386408