Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically.

A228385

Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically.

Terms

    a(0) =2a(1) =5a(2) =21a(3) =72a(4) =268a(5) =963a(6) =3513a(7) =12732a(8) =46274a(9) =167977a(10) =610085a(11) =2215300a(12) =8044836a(13) =29213495a(14) =106085921a(15) =385237512a(16) =1398945714a(17) =5080103005a(18) =18447794373a(19) =66990969264a(20) =243269759052a(21) =883405230683

External references