Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
A252472
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =17061a(1) =24331a(2) =213791a(3) =1741406a(4) =14105131a(5) =115183323a(6) =937980722a(7) =7634089567a(8) =62282795777a(9) =507708323820
External references
- oeis: A252472