Number of n X n arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row.
A221618
Number of n X n arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row.
Terms
- a(0) =1a(1) =3a(2) =112a(3) =85035a(4) =3451956516
External references
- oeis: A221618