Number of n X n 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
A268964
Number of n X n 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =3a(1) =60a(2) =2016a(3) =136080a(4) =18852912a(5) =5712070032
External references
- oeis: A268964