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A033648
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Trajectory of 3 under map x->x + (x-with-digits-reversed).
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6
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3, 6, 12, 33, 66, 132, 363, 726, 1353, 4884, 9768, 18447, 92928, 175857, 934428, 1758867, 9447438, 17794887, 96644658, 182289327, 906271608, 1712444217, 8836886388, 17673772776, 85401510447, 159803020905, 668823329856, 1327746658722, 3606313135953, 7201626272016
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Normally one stops as soon as a palindrome is reached.
A Reverse and Add! sequence.
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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@# &, 3, 29] (from Robert G. Wilson v, Dec 16 2005)
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PROG
| (Haskell)
a033648 n = a033648_list !! n
a033648_list = iterate a056964 3 -- Reinhard Zumkeller, Sep 22 2011
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CROSSREFS
| Cf. A006960, A001127, A033649, A033650, A033651.
Cf. A056964, A004086.
Sequence in context: A049941 A026079 A066710 * A102972 A075209 A075207
Adjacent sequences: A033645 A033646 A033647 * A033649 A033650 A033651
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KEYWORD
| nonn,base
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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