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 4 6 or 7.
A252138
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 4 6 or 7.
Terms
- a(0) =3905a(1) =24031a(2) =213689a(3) =1741344a(4) =14105069a(5) =115183261a(6) =937980660a(7) =7634089505a(8) =62282795715a(9) =507708323758
External references
- oeis: A252138