Number of 3 X n arrays with rows being permutations of 0..n-1 and no column j greater than column j-1 in all rows.
A212856
Number of 3 X n arrays with rows being permutations of 0..n-1 and no column j greater than column j-1 in all rows.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =163a(4) =8983a(5) =966751a(6) =179781181a(7) =53090086057
External references
- oeis: A212856