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Search: id:A097929
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| A097929 |
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Numbers in base 10 that are palindromic in bases 4 and 5. |
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+0
4
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| 1, 2, 3, 46, 9222, 76449, 193662, 2347506, 2593206, 17099841, 17402241, 25651017, 32317933
(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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9222 base 10 is 2100012 base 4
9222 base 10 is 243342 base 5
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MATHEMATICA
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Do[ p4 = IntegerDigits[n, 4]; If[ FromDigits[ Reverse[ p4]] == FromDigits[p4], p5 = IntegerDigits[n, 5]; If[ FromDigits[ Reverse[p5]] == FromDigits[p5], Print[n]]], {n, 2*10^7}] (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: A042819 A100443 A060415 this_sequence A041501 A144420 A163488
Adjacent sequences: A097926 A097927 A097928 this_sequence A097930 A097931 A097932
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KEYWORD
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base,nonn
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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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