Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4.
A123778
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 4.
Terms
- a(0) =1a(1) =12a(2) =425a(3) =17610a(4) =818803a(5) =40408828a(6) =2078794759a(7) =110210311068
External references
- oeis: A123778