Number of 3Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

A207443

Number of 3Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

Terms

    a(0) =6a(1) =36a(2) =108a(3) =323a(4) =1058a(5) =3223a(6) =9515a(7) =28426a(8) =84486a(9) =249106a(10) =734637a(11) =2166526a(12) =6380211a(13) =18782449a(14) =55296998a(15) =162765970a(16) =479038288a(17) =1409873905a(18) =4149367138a(19) =12211531035a(20) =35938252497a(21) =105765419940a(22) =311263342522a(23) =916033572652

External references