Number of 19 X 19 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
A156427
Number of 19 X 19 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
Terms
- a(0) =1a(1) =168992a(2) =5552479800
External references
- oeis: A156427