81228

Appears in sequences

• Expansion of 1/((1-x)(1-4x)(1-5x)(1-6x)).at n=5A021744
• Number of bipartite graphs with 5 edges on nodes {1..n}.at n=8A053528
• Sum(j=1,n,floor(A000041(j)/j)).at n=56A086736
• Triangle read by rows: T(n,k) is number of labeled bipartite graphs with n nodes and k edges.at n=47A117279