Number of n X n 0..3 arrays with row sums 7 and column sums 7.
A172724
Number of n X n 0..3 arrays with row sums 7 and column sums 7.
Terms
- a(0) =0a(1) =0a(2) =21a(3) =20112a(4) =84202220
External references
- oeis: A172724
A172724
Number of n X n 0..3 arrays with row sums 7 and column sums 7.