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A172505
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a(n) = numerator of fraction a/b, where gcd(a, b) = 1, whose decimal representation has the form (1)(2)(3)...(n-1)(n).(1)(2)(3)...(n-1)(n)... with period (1)(2)(3)...(n-1)(n).
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1
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OFFSET
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1,1
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COMMENTS
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Sequence of denominators: 9, 33, 333, 9999, 33333, 333333, ... Conjecture: this sequence is not equal to the sequence A172498.
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LINKS
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EXAMPLE
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a(6) = 41152000000; 41152000000/333333 = 123456.123456123456... (period 123456).
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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