Number of n X 2 0..7 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling seven exactly once.
A270145
Number of n X 2 0..7 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling seven exactly once.
Terms
- a(0) =8a(1) =1440a(2) =85056a(3) =4126368a(4) =182257536a(5) =7623445344a(6) =307704553920
External references
- oeis: A270145