Number of 4 X 7 matrices with elements in 0..n with each row and each column in nondecreasing order. 4,7,n can be permuted, see formula.
A140908
Number of 4 X 7 matrices with elements in 0..n with each row and each column in nondecreasing order. 4,7,n can be permuted, see formula.
Terms
- a(0) =1a(1) =330a(2) =32670a(3) =1557270a(4) =44537922a(5) =868489479a(6) =12544848030a(7) =142174944340
External references
- oeis: A140908