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

0,3

Links

Table of n, a(n) for n=0..71.

Eric Weisstein's World of Mathematics, Digitaddition

Crossrefs

Sequence in context: A042774 A042776 A042778 * A165133 A044217 A044598

Adjacent sequences: A031209 A031210 A031211 * A031213 A031214 A031215

Keyword

nonn,base

Author

Eric W. Weisstein

Extensions

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

Status

approved