4479288703domain: NAppears in sequencesNumber of n X 4 arrays with rows being permutations of 0..3 and no column j greater than column j-1 in all rows.at n=6A212851Number of 7 X n arrays with rows being permutations of 0..n-1 and no column j greater than column j-1 in all rows.at n=4A212860