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Search: id:A029975
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| A029975 |
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Palindromic primes in base 7. |
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+0
4
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| 2, 3, 5, 71, 107, 157, 257, 271, 307, 2549, 2647, 2801, 3347, 3697, 3851, 4201, 4397, 4649, 4951, 5399, 5651, 5749, 5903, 6449, 6701, 7451, 7703, 8053, 8501, 8753, 9103, 9551, 10007, 10357, 10903, 11057, 11953, 12157, 12409, 13109
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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P. De Geest, World!Of Palindromic Primes
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MATHEMATICA
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f[n_]:=FromDigits[RealDigits[n, 7][[1]]]==FromDigits[Reverse[RealDigits[n, 7][[1]]]]; lst={}; Do[p=Prime[n]; If[f[p], AppendTo[lst, p]], {n, 8!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 10 2009]
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CROSSREFS
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Sequence in context: A084839 A103110 A042239 this_sequence A042787 A041131 A084960
Adjacent sequences: A029972 A029973 A029974 this_sequence A029976 A029977 A029978
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com)
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