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Search: id:A097928
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| A097928 |
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Numbers in base 10 that are palindromic in bases 3 and 4. |
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+0
4
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| 1, 2, 10, 130, 11950, 175850, 749470, 1181729, 11435450
(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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175850 base 10 is 22221012222 base 3
175850 base 10 is 222323222 base 4
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MATHEMATICA
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Do[ p3 = IntegerDigits[n, 3]; If[ FromDigits[ Reverse[ p3]] == FromDigits[p3], p4 = IntegerDigits[n, 4]; If[ FromDigits[ Reverse[p4]] == FromDigits[p4], 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: A125993 A011805 A111135 this_sequence A011838 A118183 A134051
Adjacent sequences: A097925 A097926 A097927 this_sequence A097929 A097930 A097931
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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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