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Search: id:A066044
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| A066044 |
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Numbers n that are repdigits in more bases (smaller than n) than any smaller number. |
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+0
2
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| 2, 3, 7, 15, 24, 40, 60, 120, 180, 336, 360, 720, 840, 1260, 1440, 1680, 2520, 5040, 7560, 10080, 15120, 20160, 25200, 27720, 45360, 50400, 55440, 83160, 110880, 166320, 221760
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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A repdigit has all digits the same in some base.
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EXAMPLE
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15 is on the list since 15 = 1111_2 = 33_4 = 11_14, and no smaller number is a repdigit in 3 different bases
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MATHEMATICA
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Do[ c = 1; k = 2; While[ k < n-1, If[ Length[ Union[ IntegerDigits[n, k]]] == 1, c++ ]; k++ ]; If[a[[c]] == 0, a[[c]] = n; Print[c, " = ", n]], {n, 1, 200000} ]
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CROSSREFS
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Cf. A066460.
Sequence in context: A077161 A068080 A098763 this_sequence A066460 A006884 A074742
Adjacent sequences: A066041 A066042 A066043 this_sequence A066045 A066046 A066047
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KEYWORD
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nonn
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AUTHOR
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Erich Friedman (efriedma(AT)stetson.edu), Dec 29 2001
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 02 2002
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