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A031352
6-multiplicative persistence: number of iterations of "multiply 6th powers of digits" needed to reach 0 or 1.
1
0, 3, 3, 2, 3, 3, 3, 3, 3, 1, 1, 3, 3, 2, 3, 3, 3, 3, 3, 1, 3, 2, 3, 3, 2, 3, 3, 3, 2, 1, 3, 3, 3, 3, 2, 2, 3, 2, 2, 1, 2, 3, 3, 3, 2, 2, 2, 2, 3, 1, 3, 2, 2, 2, 2, 2, 3, 2, 2, 1, 3, 3, 2, 2, 2, 3, 2, 2, 3, 1, 3, 3, 3, 2, 3, 2, 2, 2, 2, 1, 3, 3, 2, 2, 2, 2, 2, 3, 2, 1, 3, 2, 2, 3, 2, 3, 2, 2, 3
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Multiplicative Persistence
CROSSREFS
Sequence in context: A178307 A327465 A079063 * A374406 A245885 A188834
KEYWORD
nonn,base
EXTENSIONS
Offset 1 from Seiichi Manyama, Jan 13 2020
STATUS
approved