Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically.

A207267

Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically.

Terms

    a(0) =18a(1) =324a(2) =1014a(3) =3513a(4) =14184a(5) =45520a(6) =135686a(7) =417772a(8) =1253238a(9) =3651096a(10) =10647801a(11) =30923564a(12) =88853464a(13) =254267485a(14) =725590642a(15) =2060214105a(16) =5827339605a(17) =16437397037a(18) =46220378910a(19) =129590864085a(20) =362487844504

External references