Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1.
A255019
Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1.
Terms
- a(0) =26a(1) =134a(2) =1489a(3) =21854a(4) =480456a(5) =16789556a(6) =896763036a(7) =73759241667
External references
- oeis: A255019