Number of 2 X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.
A269202
Number of 2 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) =16a(1) =180a(2) =1284a(3) =9612a(4) =68052a(5) =472044a(6) =3212820a(7) =21562476a(8) =143085588a(9) =940780908a(10) =6138286356a(11) =39791327340a(12) =256517615124
External references
- oeis: A269202