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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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3
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1, 2, 3, 46, 9222, 76449, 193662, 2347506, 2593206, 17099841, 17402241, 25651017, 32317933, 16516113567, 16619231967, 155784877126, 2806999337418, 3101308506654, 37004798195346, 47470618709562, 48517516968462
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Cino Hilliard, util.gp PARI Functions not in the PARI Librery.
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EXAMPLE
| 9222 base 10 is 2100012 base 4
9222 base 10 is 243342 base 5
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MATHEMATICA
| 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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PROG
| (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
| Sequence in context: A100443 A060415 A191996 * A041501 A163488 A173355
Adjacent sequences: A097926 A097927 A097928 * A097930 A097931 A097932
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KEYWORD
| base,nonn
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Sep 04 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 07 2004
a(14)-a(21) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 23 2010
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