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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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3
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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, 9689802280, 203509031168, 204191148800, 231773764784, 321015775216, 4102350269485, 12262956787888
(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
| 269957 base 10 is 5441445 base 6
269957 base 10 is 2203022 base 7
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MATHEMATICA
| 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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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: A075832 A037434 A033170 * A162225 A010348 A171591
Adjacent sequences: A097928 A097929 A097930 * A097932 A097933 A097934
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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(22)-a(28) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 23 2010
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