Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 68.
A156523
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 68.
Terms
- a(0) =2a(1) =2a(2) =80a(3) =404a(4) =63392a(5) =1572582a(6) =1619260788a(7) =75946691122
External references
- oeis: A156523