Number of n X 3 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.
A269271
Number of n X 3 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.
Terms
- a(0) =24a(1) =1368a(2) =46872a(3) =1365336a(4) =36673560a(5) =938176344a(6) =23230366488a(7) =561939624792
External references
- oeis: A269271