Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 19.
A156471
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 19.
Terms
- a(0) =2a(1) =28a(2) =76a(3) =6024a(4) =39000a(5) =4562152a(6) =61580624a(7) =13526490400a(8) =338077231956
External references
- oeis: A156471