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A065210 Five 'Reverse and Add' steps are needed to reach a palindrome. 3
166, 176, 198, 265, 275, 297, 364, 374, 396, 463, 473, 495, 549, 562, 572, 594, 639, 648, 661, 671, 693, 738, 760, 770, 792, 837, 846, 891, 936, 945, 990, 1396, 1486, 1576, 1666, 1697, 1756, 1787, 1791, 1793, 1796, 1846, 1877, 1883, 1886, 1890, 1936
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The number of steps starts at 0, so palindromes (cf. A002113) are excluded.
LINKS
MATHEMATICA
palQ[k_]:=IntegerDigits[k]==Reverse[IntegerDigits[k]]; fraQ[n_]:= Module[ {ras=NestList[#+FromDigits[Reverse[IntegerDigits[#]]]&, n, 5]}, palQ/@ ras=={False, False, False, False, False, True}]; Select[Range[2000], fraQ] (* Harvey P. Dale, Sep 28 2015 *)
CROSSREFS
Sequence in context: A203183 A184128 A015982 * A261261 A261288 A038007
KEYWORD
nonn,base
AUTHOR
Klaus Brockhaus, Oct 21 2001
EXTENSIONS
Offset changed to 1 by Harry J. Smith, Oct 14 2009
STATUS
approved

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Last modified September 19 13:29 EDT 2024. Contains 376012 sequences. (Running on oeis4.)