750751

Appears in sequences

• Number of 5-alternating permutations.at n=15A181936
• Generalized Euler numbers. Square array A(n,k), n >= 1, k >= 0, read by antidiagonals. A(n,k) = n-alternating permutations of length n*k.at n=31A181985
• n-alternating permutations of length 3n.at n=4A211213