Number of n X n 0..3 arrays with row sums 15 and column sums 15.

A172729

Number of n X n 0..3 arrays with row sums 15 and column sums 15.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =20933840

External references