Number of 2 X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or nw-se.

A228797

Number of 2 X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or nw-se.

Terms

    a(0) =2a(1) =2a(2) =8a(3) =16a(4) =42a(5) =98a(6) =240a(7) =576a(8) =1394a(9) =3362a(10) =8120a(11) =19600a(12) =47322a(13) =114242a(14) =275808a(15) =665856a(16) =1607522a(17) =3880898a(18) =9369320a(19) =22619536a(20) =54608394a(21) =131836322a(22) =318281040a(23) =768398400a(24) =1855077842a(25) =4478554082a(26) =10812186008a(27) =26102926096a(28) =63018038202a(29) =152139002498

External references