Number of 4Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.

A207307

Number of 4Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically.

Terms

    a(0) =8a(1) =64a(2) =200a(3) =643a(4) =1759a(5) =4939a(6) =14446a(7) =41505a(8) =118266a(9) =339548a(10) =975493a(11) =2795633a(12) =8015023a(13) =22994104a(14) =65948845a(15) =189120690a(16) =542403026a(17) =1555646545a(18) =4461518045a(19) =12795484071a(20) =36697414724a(21) =105247642363a(22) =301847990088a(23) =865695191094

External references