Number of n X 2 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

A297909

Number of n X 2 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =5a(2) =12a(3) =37a(4) =104a(5) =301a(6) =864a(7) =2485a(8) =7144a(9) =20541a(10) =59056a(11) =169797a(12) =488184a(13) =1403597a(14) =4035520a(15) =11602645a(16) =33359112a(17) =95911773a(18) =275758800a(19) =792842341a(20) =2279524632a(21) =6553929197a(22) =18843397088a(23) =54177212405a(24) =155766517544a(25) =447848955517

External references