Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

A261377

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

Terms

    a(0) =154a(1) =266a(2) =869a(3) =2282a(4) =5633a(5) =14312a(6) =39494a(7) =99168a(8) =261501a(9) =666722a(10) =1785513a(11) =4510376a(12) =12029879a(13) =30520850a(14) =81445076a(15) =206279050a(16) =550615794a(17) =1395355514a(18) =3723483907a(19) =9434612056a(20) =25180483084a(21) =63803504988a(22) =170274449783a(23) =431455039974

External references