Number of 6Xn arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row.

A221628

Number of 6Xn arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row.

Terms

    a(0) =1a(1) =7a(2) =7279a(3) =14576404a(4) =230141263315

External references