Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically.

A207462

Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically.

Terms

    a(0) =6a(1) =36a(2) =98a(3) =358a(4) =1152a(5) =3910a(6) =12994a(7) =43596a(8) =145678a(9) =487502a(10) =1630196a(11) =5453054a(12) =18238998a(13) =61008244a(14) =204063338a(15) =682563198a(16) =2283064944a(17) =7636504950a(18) =25542956650a(19) =85437392020a(20) =285775310062a(21) =955875582398

External references