Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.
A252597
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.
Terms
- a(0) =303a(1) =1151a(2) =7769a(3) =81441a(4) =1547711a(5) =49281939a(6) =2541062469a(7) =205891508707
External references
- oeis: A252597