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A033975
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Trajectory of 1 under map n->39n+1 if n odd, n->n/2 if n even
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0
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1, 40, 20, 10, 5, 196, 98, 49, 1912, 956, 478, 239, 9322, 4661, 181780, 90890, 45445, 1772356, 886178, 443089, 17280472, 8640236, 4320118, 2160059, 84242302, 42121151, 1642724890, 821362445, 32033135356
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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NestList[If[EvenQ[#], #/2, 39#+1]&, 1, 30] (* Harvey P. Dale, Feb 04 2015 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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