Number of n X 2 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

A297953

Number of n X 2 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =13a(4) =23a(5) =49a(6) =99a(7) =189a(8) =383a(9) =777a(10) =1531a(11) =3061a(12) =6167a(13) =12289a(14) =24531a(15) =49197a(16) =98351a(17) =196473a(18) =393259a(19) =786661a(20) =1572551a(21) =3145585a(22) =6292227a(23) =12582429a(24) =25164767a(25) =50333673a(26) =100663387a(27) =201322453a(28) =402657143a(29) =805310689

External references