Number of n X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.
A269195
Number of n X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.
Terms
- a(0) =4a(1) =180a(2) =25572a(3) =15289548a(4) =34838403756
External references
- oeis: A269195