56524

Appears in sequences

• a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026681.at n=13A026690
• a(n) = A027113(n, 2n-7).at n=9A027125
• Number of nonisomorphic graded posets with 0 and 1 and non-uniform Hasse graph of rank n, with no 3-element antichain.at n=10A208737
• Numbers k such that A073734(k) is neither squarefree nor a prime power.at n=27A365899