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A033650
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Trajectory of 7 under map x --> x + (x-with-digits-reversed).
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8
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7, 14, 55, 110, 121, 242, 484, 968, 1837, 9218, 17347, 91718, 173437, 907808, 1716517, 8872688, 17735476, 85189247, 159487405, 664272356, 1317544822, 3602001953, 7193004016, 13297007933, 47267087164, 93445163438, 176881317877, 955594506548, 1801200002107
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graph;
refs;
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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A Reverse and Add! sequence.
Trajectories of 19, 23, 28, 29, 32, 37, 38, 41, 46, 47, 49, 50, ..., merge into this sequence. - Robert G. Wilson v, Dec 16 2005
A Reverse and Add! sequence.
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LINKS
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MAPLE
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a:= proc(n) option remember; `if`(n=0, 7, (h-> h+ (s->
parse(cat(s[-i]$i=1..length(s))))(""||h))(a(n-1)))
end:
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MATHEMATICA
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PROG
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(Haskell)
a033650 n = a033650_list !! n
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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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