Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 3.
A156432
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 3.
Terms
- a(0) =1a(1) =6a(2) =12a(3) =136a(4) =294a(5) =3924a(6) =9712a(7) =156128a(8) =424980a(9) =8019000a(10) =23622288a(11) =509911008a(12) =1609793976a(13) =39027027088a(14) =131023800192
External references
- oeis: A156432