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

A208143

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

Terms

    a(0) =8a(1) =64a(2) =240a(3) =900a(4) =2400a(5) =6400a(6) =14000a(7) =30625a(8) =58800a(9) =112896a(10) =197568a(11) =345744a(12) =564480a(13) =921600a(14) =1425600a(15) =2205225a(16) =3267000a(17) =4840000a(18) =6921200a(19) =9897316a(20) =13741728a(21) =19079424a(22) =25836720a(23) =34987225a(24) =46373600a(25) =61465600a(26) =79968000a(27) =104040000

External references