Number of 3*n X n 0..1 arrays with row sums 2 and column sums 6.
A172562
Number of 3*n X n 0..1 arrays with row sums 2 and column sums 6.
Terms
- a(0) =0a(1) =1a(2) =1680a(3) =32496156
External references
- oeis: A172562
A172562
Number of 3*n X n 0..1 arrays with row sums 2 and column sums 6.