Number of n X 2 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
A268989
Number of n X 2 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =4a(1) =13a(2) =41a(3) =126a(4) =379a(5) =1121a(6) =3272a(7) =9449a(8) =27049a(9) =76866a(10) =217079a(11) =609793a(12) =1705036a(13) =4748101a(14) =13174889a(15) =36440646a(16) =100503667a(17) =276476129a(18) =758785424a(19) =2078056481a(20) =5680052329a(21) =15497929098a(22) =42216552431a(23) =114824352001a(24) =311871557524
External references
- oeis: A268989