Number of ways to build a contiguous building with n LEGO blocks of size 1 X 7 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position.
A123808
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 7 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) =13a(1) =190a(2) =3289a(3) =59970a(4) =1154985a(5) =22797643a(6) =461266481a(7) =9477047041
External references
- oeis: A123808