Number of (n+2) X (n+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 2 or 4.
A251674
Number of (n+2) X (n+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 2 or 4.
Terms
- a(0) =293a(1) =865a(2) =5527a(3) =64309a(4) =1374165a(5) =47407259a(6) =2525118941a(7) =207194435581
External references
- oeis: A251674