Number of 4 X n arrays with rows being permutations of 0..n-1 and no column j greater than column j-1 in all rows.
A212857
Number of 4 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) =15a(3) =1135a(4) =271375a(5) =158408751a(6) =191740223841
External references
- oeis: A212857