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A033652
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Trajectory of 13 under map x->x + (x-with-digits-reversed).
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2
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13, 44, 88, 176, 847, 1595, 7546, 14003, 44044, 88088, 176176, 847847, 1596595, 7553546, 14007103, 44177144, 88354288, 176599676, 853595347, 1597190705, 6668108656, 13236127322, 35608290553, 71117571206
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OFFSET
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0,1
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COMMENTS
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To get the next term, reverse the present term and add it to itself.
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LINKS
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FORMULA
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a(n+1) = a(n) + {a(n) reversed}.
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EXAMPLE
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44 = 13 + 31.
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MATHEMATICA
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NestList[#+FromDigits[Reverse[IntegerDigits[#]]]&, 13, 30] (* Harvey P. Dale, Mar 04 2015 *)
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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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