433440

Appears in sequences

• Triangular array read by rows: T(n,k) is the number of labeled posets on [n] that are composed of exactly k irreducible posets, n >= 0, 0 <= k <= n.at n=42A354615
• Number of unordered triples of self-avoiding paths with nodes that cover all vertices of a convex n-gon.at n=9A359404
• Indices of records in A362451.at n=10A362457
• Expansion of e.g.f. (1-x)^3/(1-3x+2x^2-x^3).at n=7A364524
• Triangle read by rows: T(n, k) = (-1)^(n-k) * (2*n + 1)! * [y^(2*k)] [x^(2*n+1)] arctan(sec(x*y)*tanh(x)).at n=12A371687
• Triangle read by rows: T(n,k) is the number of sets of noncrossing paths of size k that cover n nodes arranged in a circle with one node paths disallowed, 0 <= k <= floor(n/2).at n=33A390893