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A162696 Trajectory of 1 under morphism taking n to sorted divisors of n+1. 0
1, 2, 1, 3, 1, 2, 1, 2, 4, 1, 2, 1, 3, 1, 2, 1, 3, 1, 5, 1, 2, 1, 3, 1, 2, 1, 2, 4, 1, 2, 1, 3, 1, 2, 1, 2, 4, 1, 2, 1, 2, 3, 6, 1, 2, 1, 3, 1, 2, 1, 2, 4, 1, 2, 1, 3, 1, 2, 1, 3, 1, 5, 1, 2, 1, 3, 1, 2, 1, 2, 4, 1, 2, 1, 3, 1, 2, 1, 3, 1, 5, 1, 2, 1, 3, 1, 2, 1, 3, 1, 2, 4, 1, 7, 1, 2, 1, 3, 1, 2, 1, 2, 4, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

1 -> 1,2; 2->1,3; 3->1,2,4; ...

LINKS

Table of n, a(n) for n=1..105.

Index entries for sequences that are fixed points of mappings

EXAMPLE

1 -> 1,2 -> 1,2,1,3 -> 1,2,1,3,1,2,1,2,4 -> ...

PROG

(PARI) v=[1, 2]; for(i=2, 60, v=concat(v, divisors(v[i]+1))); v

CROSSREFS

Cf. A007001, A001511, A027750.

Sequence in context: A176207 A059130 A094959 * A309978 A108103 A111376

Adjacent sequences:  A162693 A162694 A162695 * A162697 A162698 A162699

KEYWORD

nonn

AUTHOR

Franklin T. Adams-Watters, Jul 10 2009

STATUS

approved

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Last modified November 17 10:37 EST 2019. Contains 329225 sequences. (Running on oeis4.)