Number of 3Xn binary arrays without the pattern 0 1 diagonally or antidiagonally.

A188825

Number of 3Xn binary arrays without the pattern 0 1 diagonally or antidiagonally.

Terms

    a(0) =8a(1) =16a(2) =48a(3) =144a(4) =432a(5) =1296a(6) =3888a(7) =11664a(8) =34992a(9) =104976a(10) =314928a(11) =944784a(12) =2834352a(13) =8503056a(14) =25509168a(15) =76527504a(16) =229582512a(17) =688747536a(18) =2066242608a(19) =6198727824a(20) =18596183472a(21) =55788550416a(22) =167365651248a(23) =502096953744

External references