Number of n X n 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
A269145
Number of n X n 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
Terms
- a(0) =0a(1) =80a(2) =13904a(3) =7002040a(4) =12637025328
External references
- oeis: A269145