Number of nX2 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

A298189

Number of nX2 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =8a(2) =26a(3) =88a(4) =298a(5) =1012a(6) =3440a(7) =11700a(8) =39804a(9) =135432a(10) =460832a(11) =1568112a(12) =5336024a(13) =18157728a(14) =61788368a(15) =210258064a(16) =715482384a(17) =2434699680a(18) =8284988960a(19) =28192819392a(20) =95936772448a(21) =326461301312

External references