Number of n X 6 arrays with each row a permutation of 1..6 having at least as many downsteps as the preceding row, with rows in lexicographically nonincreasing order.
A222004
Number of n X 6 arrays with each row a permutation of 1..6 having at least as many downsteps as the preceding row, with rows in lexicographically nonincreasing order.
Terms
- a(0) =720a(1) =138715a(2) =15637284a(3) =1252017597a(4) =77961426700
External references
- oeis: A222004