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A033670
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Trajectory of 89 under map x->x + (x-with-digits-reversed).
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8
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89, 187, 968, 1837, 9218, 17347, 91718, 173437, 907808, 1716517, 8872688, 17735476, 85189247, 159487405, 664272356, 1317544822, 3602001953, 7193004016, 13297007933, 47267087164, 93445163438
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listen;
history;
text;
internal format)
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OFFSET
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0,1
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COMMENTS
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REFERENCES
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Popular Computing (Calabasas, CA), The 196 Problem, Vol. 3 (No. 30, Sep 1975), page PC30-6. Gives full 25-term trajectory of 89.
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LINKS
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EXAMPLE
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a(3) = 968 because 187 + 781 = 968
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MATHEMATICA
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NestList[# + FromDigits[Reverse[IntegerDigits[#]]]&, 89, 40] (* Vincenzo Librandi, May 03 2014 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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