Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 53.

A156516

Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 53.

Terms

    a(0) =2a(1) =12a(2) =180a(3) =6058a(4) =2130020a(5) =3614728470

External references