Number of 3Xn arrays containing n copies of 0..3-1 with no equal horizontal or vertical neighbors.

A264955

Number of 3Xn arrays containing n copies of 0..3-1 with no equal horizontal or vertical neighbors.

Terms

    a(0) =6a(1) =12a(2) =36a(3) =114a(4) =420a(5) =1584a(6) =6228a(7) =24930a(8) =101376a(9) =417504a(10) =1734876a(11) =7271238a(12) =30667068a(13) =130119672a(14) =554721564a(15) =2375331042a(16) =10209040920a(17) =44027206416a(18) =190434749196a(19) =825936571446

External references