A031211 Periods of sum of 8th powers of digits iterated until the sequence becomes periodic.

1, 25, 154, 154, 154, 154, 25, 154, 154, 1, 25, 154, 154, 1, 25, 25, 1, 154, 154, 25, 154, 154, 25, 154, 154, 154, 25, 154, 1, 154, 154, 25, 154, 25, 25, 25, 1, 154, 154, 154, 1, 154, 25, 154, 25, 25, 154, 154, 154, 154, 25, 154, 25, 25, 25, 154, 25, 154