10929600

Appears in sequences

• Number of abstract simplicial 2-complexes on {1,2,3,...,n+3} which triangulate the 2-sphere: C(n+3,2)*(4n+1)!/(3n+3)!.at n=5A007816
• Triangle read by rows: T(n,k) is the number of labeled 2-connected planar graphs with n nodes and k edges, n >= 3, n <= k <= 3(n-2).at n=48A100960
• Triangle read by rows: T(n,k) is the number of labeled connected planar graphs on n vertices and k edges.at n=57A288265
• Number of even permutations on n letters that have a root.at n=9A338575