251370

Appears in sequences

• Expansion of Product_{k>=1} (1 - x^k)^15.at n=47A010822
• Number of proper T_1-hypergraphs with 3 labeled nodes and n hyperedges.at n=28A056078
• Irregular triangle read by rows T(n,k) (n>=1, 0<=k<=n(n-1)/2) giving the total number of connected components in all subgraphs (V,E') with |E'|=k of the complete labeled graph K_n=(V,E).at n=49A125205
• Number of 2 X 2 matrices having all terms in {1,...,n} and positive even determinant.at n=29A211067
• Capless binary boundary codes for holeless strictly non-overlapping polyhexes, only the maximal representative from each equivalence class obtained by rotating.at n=20A258004
• Capless binary boundary codes for fusenes, maximal representative from each equivalence class up to rotation.at n=20A258014
• Numbers n such that n and n^2 are both a sum of two positive cubes.at n=1A274128
• Composite k for which lcm(k, phi(k)) + lcm(k, tau(k)) = lcm(k, sigma(k)).at n=8A328651
• a(n) is the number of ways to partition the set of vertices of a convex (n+14)-gon into 5 nonintersecting polygons.at n=7A350303
• a(n) = 2*n*binomial(n, 4).at n=20A391978