Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.

A208119

Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.

Terms

    a(0) =9a(1) =81a(2) =225a(3) =625a(4) =3025a(5) =14641a(6) =53361a(7) =194481a(8) =815409a(9) =3418801a(10) =13359025a(11) =52200625a(12) =211266225a(13) =855036081a(14) =3400172721a(15) =13521270961a(16) =54243807409a(17) =217611987121a(18) =869173967025

External references