Number of 13 X 13 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
A156413
Number of 13 X 13 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
Terms
- a(0) =1a(1) =1384a(2) =481320a(3) =23622288a(4) =667960824a(5) =4186295040a(6) =26532092944a(7) =72256187200a(8) =617153224314
External references
- oeis: A156413