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A001127
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Trajectory of 1 under map x->x + (x-with-digits-reversed).
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9
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1, 2, 4, 8, 16, 77, 154, 605, 1111, 2222, 4444, 8888, 17776, 85547, 160105, 661166, 1322332, 3654563, 7309126, 13528163, 49710694, 99312488, 187733887, 976071668, 1842242347, 9274664828, 17559329557, 93151725128, 175304440267, 937348843838, 1775697687577
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Normally one stops as soon as a palindrome is reached.
A Reverse and Add! sequence.
Trajectories of 25, 34, 43, 52, 59, 61, 68, 70, 86, 95, ..., merge into this sequence. - Robert G. Wilson v, Dec 16 2005.
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LINKS
| Reinhard Zumkeller, Table of n, a(n) for n = 0..250
Index entries for sequences related to Reverse and Add!
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MATHEMATICA
| NestList[ # + FromDigits@Reverse@IntegerDigits@# &, 1, 30] (from Robert G. Wilson v, Dec 16 2005)
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PROG
| (Haskell)
a001127 n = a001127_list !! n
a001127_list = iterate a056964 1 -- Reinhard Zumkeller, Sep 22 2011
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CROSSREFS
| Cf. A006960, A023108, A033648, A033649, A033650, A033651.
Cf. A056964, A004086.
Sequence in context: A066713 A004000 A051300 * A051299 A097049 A119490
Adjacent sequences: A001124 A001125 A001126 * A001128 A001129 A001130
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KEYWORD
| nonn,base,easy,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jun 05 2002
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