A118519 Define sequence S_m by: initial term = m, reverse digits and add 3 to get next term. Entry shows S_3. This reaches a cycle of length 6 in 3 steps.

3, 6, 9, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57, 78, 90, 12, 24, 45, 57