51149685

Appears in sequences

• Number of n X 5 arrays with each row a permutation of 1..5 having at least as many downsteps as the preceding row.at n=3A221620
• T(n,k)=Number of nXk arrays with each row a permutation of 1..k having at least as many downsteps as the preceding row.at n=31A221623
• Number of 4Xn arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row.at n=4A221626