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A172507 a(n) = numerator of fraction a/b, where gcd(a, b) = 1, whose decimal representation has the form (n).(n). 0
11, 11, 33, 22, 11, 33, 77, 44, 99, 101, 1111, 303, 1313, 707, 303, 404, 1717, 909, 1919, 101, 2121, 1111, 2323, 606, 101, 1313, 2727, 707, 2929, 303 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Sequence of denominators: 10, 25, 1000, 5000, 20000, 15625, 10000000, 50000000, ... Conjecture: this sequence is not equal to the sequence A078267.
LINKS
EXAMPLE
a(6) = 33; 33/5 = 6.6.
CROSSREFS
Sequence in context: A152082 A070849 A124297 * A089766 A077699 A266705
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Feb 05 2010
STATUS
approved

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Last modified February 24 02:58 EST 2024. Contains 370288 sequences. (Running on oeis4.)