Number of 2 X n 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.

A283692

Number of 2 X n 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.

Terms

    a(0) =4a(1) =16a(2) =49a(3) =161a(4) =548a(5) =1824a(6) =6081a(7) =20353a(8) =68036a(9) =227376a(10) =760145a(11) =2541153a(12) =8494692a(13) =28397120a(14) =94929633a(15) =317342017a(16) =1060849668a(17) =3546339664a(18) =11855139953a(19) =39630819361a(20) =132482782884a(21) =442879752544

External references