Number of n X n 0..3 arrays with row sums 6 and column sums 6.

A172722

Number of n X n 0..3 arrays with row sums 6 and column sums 6.

Terms

    a(0) =0a(1) =1a(2) =55a(3) =27636a(4) =45934340a(5) =210668680701

External references