Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 81.
A156526
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 81.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =184a(4) =772a(5) =77184a(6) =641136a(7) =2194362732
External references
- oeis: A156526