Number of 9*n X n 0..1 arrays with row sums 2 and column sums 18.
A172614
Number of 9*n X n 0..1 arrays with row sums 2 and column sums 18.
Terms
- a(0) =0a(1) =1a(2) =227873431500
External references
- oeis: A172614
A172614
Number of 9*n X n 0..1 arrays with row sums 2 and column sums 18.