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

A207249

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

Terms

    a(0) =6a(1) =36a(2) =102a(3) =370a(4) =1232a(5) =4238a(6) =14406a(7) =49164a(8) =167530a(9) =571202a(10) =1947168a(11) =6638170a(12) =22629802a(13) =77146700a(14) =262997994a(15) =896578158a(16) =3056494736a(17) =10419796218a(18) =35521783770a(19) =121096145300a(20) =412824884294

External references