Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318078

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =7a(2) =11a(3) =22a(4) =34a(5) =64a(6) =132a(7) =280a(8) =556a(9) =1083a(10) =2208a(11) =4480a(12) =9083a(13) =18324a(14) =37073a(15) =74864a(16) =151386a(17) =307006a(18) =622583a(19) =1259310a(20) =2546594a(21) =5156916a(22) =10449815a(23) =21161643a(24) =42837534a(25) =86725499a(26) =175609679a(27) =355607121a(28) =720103580a(29) =1458127803

External references