Number of n X 3 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totaling seven exactly once.
A270113
Number of n X 3 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totaling seven exactly once.
Terms
- a(0) =112a(1) =100800a(2) =45440640a(3) =16972694928
External references
- oeis: A270113