Number of n X 2 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element.

A283036

Number of n X 2 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element.

Terms

    a(0) =0a(1) =4a(2) =16a(3) =68a(4) =256a(5) =924a(6) =3232a(7) =11044a(8) =37104a(9) =122984a(10) =403280a(11) =1310760a(12) =4228960a(13) =13558932a(14) =43239776a(15) =137251068a(16) =433883696a(17) =1366668772a(18) =4290998336a(19) =13433966724a(20) =41949331616a(21) =130685405648a(22) =406258440928

External references