Number of n X 2 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.

A297852

Number of n X 2 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =13a(4) =23a(5) =49a(6) =95a(7) =177a(8) =359a(9) =705a(10) =1351a(11) =2689a(12) =5303a(13) =10321a(14) =20423a(15) =40353a(16) =79223a(17) =156657a(18) =309991a(19) =611713a(20) =1210967a(21) =2399761a(22) =4750919a(23) =9419937a(24) =18694199a(25) =37092657a(26) =73659175a(27) =146373313a(28) =290909975a(29) =578470225

External references