144585

Appears in sequences

• Expansion of 1/((1-x) * (1-5*x) * (1-9*x)).at n=5A016234
• Triangle T(n, m) = T(n-1, m-1) + (4m-3)*T(n-1, m) read by rows 1<=m<=n.at n=30A111578
• a(n) = n^4/8 + (5*n^3)/12 - n^2/8 - (5*n)/12 + 1.at n=33A226639
• E.g.f. A(x) satisfies: (A(x)^2 - 4*x)^4 = (2 - A(x)^4)^2.at n=7A249789
• a(n) = n*(n+1)*(22*n-19)/6.at n=34A256716
• Numbers that have exactly 7 representations as a k-gonal number, P(n,k) = n*((k-2)*n - (k-4))/2, k and n >= 3.at n=32A321157
• Number of labeled n-vertex 2-edge multigraphs that are neither crossing nor nesting.at n=35A326247