Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 13.
A156459
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 13.
Terms
- a(0) =2a(1) =0a(2) =28a(3) =12a(4) =1412a(5) =3096a(6) =337208a(7) =4171320a(8) =662224128a(9) =16504055920
External references
- oeis: A156459