Number of 2 X n binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.

A228661

Number of 2 X n binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.

Terms

    a(0) =2a(1) =2a(2) =8a(3) =14a(4) =38a(5) =80a(6) =194a(7) =434a(8) =1016a(9) =2318a(10) =5366a(11) =12320a(12) =28418a(13) =65378a(14) =150632a(15) =346766a(16) =798662a(17) =1838960a(18) =4234946a(19) =9751826a(20) =22456664a(21) =51712142a(22) =119082134a(23) =274218560a(24) =631464962a(25) =1454120642a(26) =3348515528a(27) =7710877454a(28) =17756424038a(29) =40889056400

External references