Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 7.

A156443

Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 7.

Terms

    a(0) =10a(1) =240a(2) =12160a(3) =804511a(4) =81439488a(5) =10953612400

External references