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

A207071

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

Terms

    a(0) =8a(1) =64a(2) =216a(3) =720a(4) =2688a(5) =8799a(6) =27063a(7) =84502a(8) =257584a(9) =762900a(10) =2246895a(11) =6565968a(12) =18955015a(13) =54365475a(14) =155191828a(15) =440404000a(16) =1244062260a(17) =3502380028a(18) =9826626600a(19) =27487369521a(20) =76702016405a(21) =213558055578a(22) =593398011328

External references