Number of ways to build a contiguous building with n LEGO blocks of size 1 X 3 on top of a fixed block of the same size.

A123774

Number of ways to build a contiguous building with n LEGO blocks of size 1 X 3 on top of a fixed block of the same size.

Terms

    a(0) =14a(1) =244a(2) =5762a(3) =147801a(4) =4117161a(5) =119893930a(6) =3616711327a(7) =111950012510

External references