31559

Appears in sequences

• Number of nonisomorphic monoids (semigroups with identity) of order n.at n=7A058129
• Table, T(n,k) is the number of categories with n morphisms and k objects.at n=21A125697
• Table, T(n,k) is the number of connected categories with n morphisms and k objects.at n=12A125699
• Integer part of Gauss's Arithmetic-Geometric Mean M(1,n^4).at n=22A127760
• Number of set partitions of [n] with alternating parity of elements and exactly eight blocks.at n=6A305782
• Expansion of Product_{k>=1} 1 / ((1 - x^k) * (1 - x^(k^2)) * (1 - x^(k^3))).at n=22A369576