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Search: id:A037183
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| A037183 |
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Smallest number which is palindromic (with at least 2 digits) in n bases. |
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+0
8
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| 3, 5, 10, 21, 36, 60, 80, 120, 180, 264, 252, 360, 300, 960, 900, 720, 1080, 1440, 1800, 1680, 2160, 2880, 5616, 3780, 2520, 3600, 6120, 6720, 6300, 5040, 11340, 7560, 14112, 10800, 9240, 10080, 13860, 12600, 31200, 15120, 22680, 20160, 18480, 39312, 33264, 39600, 25200, 30240
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Smallest number k which is palindromic in n bases, 1<n<k.
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MATHEMATICA
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palindromicBases[n_] := Module[{p}, Table[p = IntegerDigits[n, b]; If[ p == Reverse[p], {b, p}, Sequence @@ {}], {b, 2, n - 1}]]; t = Table[ 0, {50}]; Do[ c = Length[ palindromicBases[n]]; If[ t[[c]] == 0, t[[c]] = n], {n, 40000}]; t (from Robert G. Wilson v (rgwv(AT)rgwv.com), May 12 2005)
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CROSSREFS
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Cf. A065531, A107129.
Sequence in context: A134365 A076862 A107129 this_sequence A024424 A018107 A053709
Adjacent sequences: A037180 A037181 A037182 this_sequence A037184 A037185 A037186
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KEYWORD
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nonn,base,nice
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AUTHOR
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Erich Friedman (erich.friedman(AT)stetson.edu)
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EXTENSIONS
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More terms from David W. Wilson (davidwwilson(AT)comcast.net)
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