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A282630
Number of steps to reach 1 when starting from n and iterating the map x -> x - A055396(x).
2
0, 1, 1, 2, 2, 3, 2, 3, 3, 4, 4, 5, 3, 4, 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 8, 9, 9, 10, 6, 7, 7, 8, 8, 9, 9, 10, 9, 10, 10, 11, 11, 12, 7, 8, 8, 9, 9, 10, 9, 10, 10, 11, 10, 11, 12, 13, 13, 14, 13, 14, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 11, 12, 12, 13, 13, 14
OFFSET
1,4
COMMENTS
This sequence tends to infinity as n tends to infinity.
PROG
(PARI) a = vector(100); for (n=1, #a, if (n>1, a[n] = 1 + a[n - primepi(factor(n)[1, 1])]); print1 (a[n] ", "))
CROSSREFS
Cf. A055396.
Sequence in context: A286716 A029213 A029209 * A108309 A341307 A103469
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Apr 09 2017
STATUS
approved