Number of ways to build a contiguous building with n LEGO blocks of size 1 X 8 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position.

A123816

Number of ways to build a contiguous building with n LEGO blocks of size 1 X 8 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position.

Terms

    a(0) =15a(1) =253a(2) =5055a(3) =106387a(4) =2364993a(5) =53883047a(6) =1258407303a(7) =29843705355

External references