Number of nX4 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.
A270114
Number of nX4 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.
Terms
- a(0) =1176a(1) =6183744a(2) =16972694928
External references
- oeis: A270114