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A031349 3-multiplicative persistence: number of iterations of "multiply 3rd powers of digits" needed to reach 0 or 1. 4
0, 4, 5, 4, 3, 4, 4, 3, 3, 1, 1, 4, 5, 4, 3, 4, 4, 3, 3, 1, 4, 4, 4, 3, 2, 3, 4, 2, 3, 1, 5, 4, 3, 3, 4, 3, 4, 3, 4, 1, 4, 3, 3, 2, 2, 3, 3, 3, 3, 1, 3, 2, 4, 2, 3, 2, 3, 2, 3, 1, 4, 3, 3, 3, 2, 3, 2, 2, 3, 1, 4, 4, 4, 3, 3, 2, 4, 3, 2, 1, 3, 2, 3, 3, 2, 2, 3, 3, 3, 1, 3, 3, 4, 3, 3, 3, 2, 3, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Multiplicative Persistence

CROSSREFS

Sequence in context: A071413 A161811 A016717 * A200605 A036444 A329505

Adjacent sequences:  A031346 A031347 A031348 * A031350 A031351 A031352

KEYWORD

nonn,base,changed

AUTHOR

Eric W. Weisstein

STATUS

approved

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Last modified January 19 21:47 EST 2020. Contains 331066 sequences. (Running on oeis4.)