Number of nX3 binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.
A228655
Number of nX3 binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.
Terms
- a(0) =2a(1) =8a(2) =34a(3) =140a(4) =574a(5) =2348a(6) =9598a(7) =39224a(8) =160282a(9) =654944a(10) =2676202a(11) =10935332a(12) =44683222a(13) =182581508a(14) =746051878a(15) =3048465200a(16) =12456425842a(17) =50898577976a(18) =207978216754a(19) =849826072316
External references
- oeis: A228655