Number of n X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
A269046
Number of n X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =3a(1) =42a(2) =594a(3) =24192a(4) =1643376a(5) =242861616a(6) =71430596250
External references
- oeis: A269046