Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6 which is flat, i.e., with all blocks in parallel position.

A123796

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6 which is flat, i.e., with all blocks in parallel position.

Terms

    a(0) =1a(1) =6a(2) =79a(3) =1138a(4) =18057a(5) =296884a(6) =5022086a(7) =86581805a(8) =1515222912

External references