Number of 3 X n 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.
A269291
Number of 3 X n 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.
Terms
- a(0) =64a(1) =2592a(2) =62748a(3) =1363572a(4) =27788292a(5) =544118148a(6) =10363900428a(7) =193439931300
External references
- oeis: A269291