Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.
A252313
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.
Terms
- a(0) =1557a(1) =1974a(2) =2493a(3) =23422a(4) =505062a(5) =17562749a(6) =937981280a(7) =77093724660
External references
- oeis: A252313