Number of n X 3 binary arrays with every 1 having exactly one king-move neighbor equal to 1.

A183436

Number of n X 3 binary arrays with every 1 having exactly one king-move neighbor equal to 1.

Terms

    a(0) =3a(1) =13a(2) =29a(3) =89a(4) =273a(5) =751a(6) =2221a(7) =6485a(8) =18647a(9) =54395a(10) =157947a(11) =457879a(12) =1330821a(13) =3863375a(14) =11214839a(15) =32568969a(16) =94558013a(17) =274542857a(18) =797165417a(19) =2314532695a(20) =6720246173a(21) =19512370773a(22) =56654003695a(23) =164495136155a(24) =477612471027

External references