Number of n X 2 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
A269137
Number of n X 2 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
Terms
- a(0) =16a(1) =148a(2) =1164a(3) =8532a(4) =59916a(5) =408596a(6) =2727564a(7) =17914580a(8) =116170764a(9) =745617300a(10) =4745165964a(11) =29984668756a(12) =188330955276
External references
- oeis: A269137