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

A297901

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

Terms

    a(0) =2a(1) =4a(2) =3a(3) =13a(4) =34a(5) =73a(6) =203a(7) =594a(8) =1443a(9) =4013a(10) =11114a(11) =29073a(12) =79243a(13) =216234a(14) =577883a(15) =1566413a(16) =4247794a(17) =11437273a(18) =30940683a(19) =83723074a(20) =225989523a(21) =610970413a(22) =1651964474a(23) =4462848673a(24) =12062978123a(25) =32607525914a(26) =88115865163a(27) =238159441613

External references