Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 1 3 4 6 or 7.
A252235
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 1 3 4 6 or 7.
Terms
- a(0) =342a(1) =3896a(2) =108882a(3) =1179792a(4) =193004352a(5) =78534150416
External references
- oeis: A252235