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A063042 Collatz-2 (A063041) trajectory starting at 3. 5
3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9, 3, 7, 36, 18, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(0) = a(5) = 3

LINKS

Table of n, a(n) for n=0..104.

FORMULA

a(0) = 3 and a(n) = A063041(a(n-1)) for n > 0

MATHEMATICA

NestList[If[PrimeQ[#], #*Prime[PrimePi[#]-1]+1, #/Min@@First/@FactorInteger[#]]&, 3, 104] (* Jayanta Basu, May 27 2013 *)

CROSSREFS

A063041.

Sequence in context: A132102 A081555 A301341 * A108505 A047158 A221511

Adjacent sequences:  A063039 A063040 A063041 * A063043 A063044 A063045

KEYWORD

nonn,easy

AUTHOR

Reinhard Zumkeller, Jul 07 2001

STATUS

approved

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Last modified December 6 14:15 EST 2019. Contains 329806 sequences. (Running on oeis4.)