Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
A252202
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =2680a(1) =5178a(2) =110128a(3) =1180226a(4) =193004794a(5) =78534150994
External references
- oeis: A252202