Number of orbits of length n under the full 18-shift (whose periodic points are counted by A001027).
A060221
Number of orbits of length n under the full 18-shift (whose periodic points are counted by A001027).
Terms
- a(0) =18a(1) =153a(2) =1938a(3) =26163a(4) =377910a(5) =5667681a(6) =87460002a(7) =1377481950a(8) =22039920504a(9) =357046533675
External references
- oeis: A060221