Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6 which is symmetric after a rotation by 180 degrees.
A123795
Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6 which is symmetric after a rotation by 180 degrees.
Terms
- a(0) =1a(1) =1a(2) =43a(3) =289a(4) =3796a(5) =30757a(6) =384465a(7) =3363194
External references
- oeis: A123795