Number of n X n 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
A269187
Number of n X n 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
Terms
- a(0) =4a(1) =108a(2) =9284a(3) =2817548a(4) =3159954052
External references
- oeis: A269187