Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6.
A252323
Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6.
Terms
- a(0) =94578a(1) =797008a(2) =7391236a(3) =70847984a(4) =727750076a(5) =7593834452a(6) =79675585116a(7) =844684816424
External references
- oeis: A252323