Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or nw-se diagonally.

A228278

Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or nw-se diagonally.

Terms

    a(0) =2a(1) =3a(2) =13a(3) =35a(4) =112a(5) =337a(6) =1034a(7) =3154a(8) =9637a(9) =29431a(10) =89895a(11) =274564a(12) =838609a(13) =2561372a(14) =7823242a(15) =23894643a(16) =72981777a(17) =222909351a(18) =680835436a(19) =2079486057a(20) =6351405998a(21) =19399196250a(22) =59251261117a(23) =180972030923a(24) =552745635451

External references