7315660800

Appears in sequences

• a(n) = n!*(n+1)!/2.at n=7A010796
• Triangle built from first column sequences of generalized Stirling2 arrays (m+2,2)-Stirling2, m >= 0.at n=37A091543
• A092186(n)/2.at n=15A092187
• Number of permutations of {1,2,3,...,n} such that no even numbers are adjacent.at n=15A258213
• Triangle read by rows: T(n,k) is the coefficient of x^(2*k) in the cycle polynomial of the complete bipartite graph K_{n,n}, 1 <= k <= n.at n=44A291909
• Number of even parity alternating permutations of [1..n] starting with an odd integer.at n=17A364849