Number of 4 X 5 matrices with elements in 0..n with each row and each column in nondecreasing order. 4,5,n can be permuted, see formula.
A140902
Number of 4 X 5 matrices with elements in 0..n with each row and each column in nondecreasing order. 4,5,n can be permuted, see formula.
Terms
- a(0) =1a(1) =126a(2) =5292a(3) =116424a(4) =1646568a(5) =16818516a(6) =133613766a(7) =868489479a(8) =4789851066a(9) =23029990984a(10) =98561919456a(11) =381644355456
External references
- oeis: A140902