Number of n X 5 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.
A269826
Number of n X 5 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.
Terms
- a(0) =1280a(1) =462680a(2) =90748696a(3) =16644595392
External references
- oeis: A269826