163270

Appears in sequences

• Number of (undirected) Hamiltonian paths in the n-dipyramidal graph.at n=26A307939
• a(n) = Sum_{k=0..n} binomial(n, k)*HT(n, k) = Sum_{k=0..n} (-1)^(n-k)*binomial(n, k)*HT(n, k), where HT(n, k) is the Hermite triangle A099174.at n=9A344501