Number of nX4 0..5 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling five exactly once.
A269884
Number of nX4 0..5 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling five exactly once.
Terms
- a(0) =450a(1) =250992a(2) =68182800a(3) =16086672048
External references
- oeis: A269884