Number of ways to build a contiguous building with n LEGO blocks of size 1 X 6 on top of a fixed block of the same size so that the building is flat, i.e., with all blocks in parallel position.
A123800
Number of ways to build a contiguous building with n LEGO blocks of size 1 X 6 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) =11a(1) =136a(2) =1991a(3) =30701a(4) =500038a(5) =8346595a(6) =142812582a(7) =2481290457a(8) =43703296703
External references
- oeis: A123800