A031212 Periods of sum of 9th powers of digits iterated until the sequence becomes periodic.

1, 1, 30, 93, 1, 19, 80, 4, 30, 80, 1, 30, 93, 4, 10, 80, 24, 30, 80, 28, 30, 93, 8, 30, 80, 28, 19, 93, 8, 30, 93, 4, 30, 80, 8, 30, 93, 8, 10, 93, 1, 10, 80, 8, 10, 93, 28, 30, 80, 28, 19, 80, 28, 30, 93, 8, 30, 93, 8, 30, 80, 24, 19, 93, 28, 30, 80, 4, 30, 80, 4, 30

Offset: 0

Author

Eric W. Weisstein

Keywords

• nonn
• base

Links

• Eric Weisstein's World of Mathematics, Digitaddition

Extensions

Missing a(0)=1 inserted by Sean A. Irvine, Apr 15 2020