Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 61.

A156518

Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 61.

Terms

    a(0) =2a(1) =12a(2) =326a(3) =16298a(4) =5919644a(5) =9055603332

External references