57581

Appears in sequences

• a(0)=1; thereafter, a(m+1) = Sum_{k=0..m} k!*a(m-k).at n=9A051295
• Table T(n,k), n>=1 and k>=0, read by antidiagonals, related to A111146.at n=54A113326
• A084938 * A000012.at n=45A134379
• A084938 * A000012.at n=46A134379
• T(n,k) is the number of permutations of [n] having exactly k pairs of integers i<j in [n] such that their cycle minima have opposite sorting order; triangle T(n,k), n>=0, 0<=k<=A125811(n)-1, read by rows.at n=47A381529