Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 19.

A156470

Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 19.

Terms

    a(0) =4a(1) =68a(2) =1844a(3) =313880a(4) =91441740a(5) =58741831848

External references