Number of 3*n X 9 0..3 arrays with row sums 3 and column sums n.
A172768
Number of 3*n X 9 0..3 arrays with row sums 3 and column sums n.
Terms
- a(0) =1680a(1) =747558000
External references
- oeis: A172768
A172768
Number of 3*n X 9 0..3 arrays with row sums 3 and column sums n.