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Search: id:A046231
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| A046231 |
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Numbers n such that n^3 is palindromic in base 4. |
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+0
4
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| 0, 1, 5, 17, 65, 257, 1025, 4097, 16385, 65537, 262145, 1048577, 4194305, 16777217, 67108865, 268435457, 1073741825, 4294967297
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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Base-2 and base 3 do not yield results below 10^8.
Next term is >10000000000 - Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 09 2006
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LINKS
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P. De Geest, World!Of Numbers
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FORMULA
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It seems that for n>=2, a(n)=4^(n-1)+1. - Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 07 2003
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MATHEMATICA
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For[i = 1, i < 1000000, i++, tmp = IntegerDigits[i^3, 4]; If[tmp == Reverse[tmp], Print[i]] ]; - Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 09 2006
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CROSSREFS
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Cf. A046232.
Cf. A052539. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 13 2008]
Adjacent sequences: A046228 A046229 A046230 this_sequence A046232 A046233 A046234
Sequence in context: A120893 A149672 A149673 this_sequence A092896 A149674 A149675
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KEYWORD
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nonn,more,base
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.
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EXTENSIONS
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More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 09 2006, corrected Nov 01 2006
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