Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 27.

A156486

Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 27.

Terms

    a(0) =5a(1) =158a(2) =6416a(3) =857040a(4) =374246510a(5) =579965060780

External references