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

A303802

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

Terms

    a(0) =2a(1) =5a(2) =7a(3) =17a(4) =35a(5) =61a(6) =127a(7) =265a(8) =507a(9) =1013a(10) =2071a(11) =4097a(12) =8147a(13) =16429a(14) =32815a(15) =65401a(16) =131115a(17) =262373a(18) =523975a(19) =1048433a(20) =2097923a(21) =4193821a(22) =8387551a(23) =16779241a(24) =33554523a(25) =67104725a(26) =134221687a(27) =268439777a(28) =536858675a(29) =1073745421

External references