601756

Appears in sequences

• Number of {2-1-3, 2'^e-31}-avoiding permutations of size n (see definition in the Elizalde paper).at n=14A143017
• Triangle read by rows: T(n,k) = number of permutations p of [n] such that max(|p(p(i)) - i|)=k (n>=1, 0<=k<=n-1).at n=51A364817