Number of 6Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
A268909
Number of 6Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
Terms
- a(0) =0a(1) =33792a(2) =715392a(3) =14644152a(4) =282550680a(5) =5344944120a(6) =99308573208
External references
- oeis: A268909