Number of n X n 0..1 arrays with row sums 6 and column sums 6.

A172544

Number of n X n 0..1 arrays with row sums 6 and column sums 6.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =5040a(7) =187530840

External references