Number of nX6 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.
A269274
Number of nX6 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.
Terms
- a(0) =1620a(1) =1104264a(2) =474819408a(3) =174924572760
External references
- oeis: A269274