OFFSET
1,1
COMMENTS
The product of the digits of each term is either 4996238671872 or 937638166841712.
The first term that produces the product 937638166841712 is a(1178695599).
LINKS
Daniel Mondot, Multiplicative Persistence Tree
EXAMPLE
277777788888899 -> 4996238671872 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0. One digit in 11 steps.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Daniel Mondot, Mar 19 2022
STATUS
approved