22934774

Appears in sequences

• a(n) = Sum_{k=1..n} ((k-1)!)^2*Stirling2(n,k)^2.at n=6A048163
• Number of permutations of length n within distance 6.at n=12A154655
• Number of acyclic orientations of the Turán graph T(n,2).at n=12A266695
• Poly-Bernoulli numbers B_n^(k) with k = -6.at n=6A283812
• Number of permutations of [n] within distance floor(n/2) of a fixed permutation.at n=12A306267
• Number A(n,k) of acyclic orientations of the complete tripartite graph K_{n,n,k}; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=27A372254
• Number A(n,k) of acyclic orientations of the Turán graph T(k*n,n); square array A(n,k), n>=0, k>=1, read by antidiagonals.at n=38A372326