Number of nX3 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
A269147
Number of nX3 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
Terms
- a(0) =24a(1) =768a(2) =13904a(3) =220968a(4) =3277728a(5) =46576336a(6) =642676704a(7) =8680278136a(8) =115349343264
External references
- oeis: A269147