A334676 - OEIS

A334676

a(n) is the least number that can be reached starting from n and iterating the nondeterministic map x -> x/d where d is a nonzero digit of x dividing x.

1, 1, 1, 1, 1, 1, 1, 1, 1, 10, 11, 1, 13, 14, 1, 16, 17, 18, 19, 10, 21, 11, 23, 1, 1, 13, 27, 14, 29, 10, 31, 16, 11, 34, 1, 1, 37, 38, 13, 10, 41, 21, 43, 11, 1, 46, 47, 1, 49, 10, 51, 13, 53, 54, 11, 56, 57, 58, 59, 10, 61, 31, 21, 16, 13, 11, 67, 68, 69

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OFFSET

1,10

COMMENTS

See A336580 for the positions of 1's.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

FORMULA

a(a(n)) = a(n).

EXAMPLE

For n = 168:

- 168 / 6 = 28, 28 / 2 = 14,