Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.

A259999

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.

Terms

    a(0) =2943a(1) =12412a(2) =39209a(3) =74850a(4) =190794a(5) =760397a(6) =1890678a(7) =4225837a(8) =14524157a(9) =43967830a(10) =103951737a(11) =307376712a(12) =941159102a(13) =2487744836a(14) =6988910173a(15) =20479305105a(16) =56255148598a(17) =160885870714a(18) =459145692332

External references