Number of 4Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302166

Number of 4Xn 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =10a(2) =17a(3) =29a(4) =51a(5) =109a(6) =206a(7) =407a(8) =791a(9) =1584a(10) =3104a(11) =6165a(12) =12131a(13) =24059a(14) =47443a(15) =93958a(16) =185498a(17) =367087a(18) =725156a(19) =1434386a(20) =2834565a(21) =5605574a(22) =11079494a(23) =21907412a(24) =43304842a(25) =85620318a(26) =169257166a(27) =334632998a(28) =661534245a(29) =1307869617

External references