Number of n X 2 0..1 arrays with no 1 equal to more than four of its king-move neighbors, with the exception of exactly two elements.

A282371

Number of n X 2 0..1 arrays with no 1 equal to more than four of its king-move neighbors, with the exception of exactly two elements.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =6a(4) =33a(5) =168a(6) =810a(7) =3780a(8) =17226a(9) =77112a(10) =340443a(11) =1486458a(12) =6431643a(13) =27619056a(14) =117846900a(15) =500088168a(16) =2112085044a(17) =8883220752a(18) =37225117269a(19) =155483824590a(20) =647540441397

External references