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Search: id:A097931
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| A097931 |
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Numbers in base 10 that are palindromic in bases 6 and 7. |
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+0
4
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| 1, 2, 3, 4, 5, 92, 135, 178, 185, 5854, 6148, 7703, 186621, 204856, 206620, 213970, 269957, 271721, 279071, 4252232, 160258808
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Cino Hilliard, util.gp PARI Functions not in the PARI Librery.
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EXAMPLE
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269957 base 10 is 5441445 base 6
269957 base 10 is 2203022 base 7
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MATHEMATICA
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Do[ p6 = IntegerDigits[n, 6]; If[ FromDigits[ Reverse[ p6]] == FromDigits[p6], p7 = IntegerDigits[n, 7]; If[ FromDigits[ Reverse[p7]] == FromDigits[p7], Print[n]]], {n, 10^9}] (from Robert G. Wilson v Sep 07 2004)
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PROGRAM
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(PARI) \Requires reading the util.gp file in the link into the gp session. Place in the \.gprc file to automate. palbase(n, b1, b2) = { for(x=1, n, if(ispal(base(10, b1, x))& ispal(base(10, b2, x)), print1(x", ")) ) }
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CROSSREFS
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Sequence in context: A075832 A037434 A033170 this_sequence A162225 A010348 A140432
Adjacent sequences: A097928 A097929 A097930 this_sequence A097932 A097933 A097934
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KEYWORD
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base,nonn,more
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Sep 04 2004
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 07 2004
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