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A079353 Numbers n such that the best rational approximation to H(n) with denominator <=n is an integer, where H(n) denotes the n-th harmonic number (A001008/A002805). 2
1, 3, 4, 10, 11, 30, 31, 82, 83, 226, 227, 615, 616, 1673, 1674 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

H(11)=83711/27720 and the best approximation to H(11) among the fractions of form k/11, k>=0, is 33/11=3, an integer. Hence 11 is in the sequence.

CROSSREFS

Sequence in context: A047341 A091910 A131179 * A135116 A050187 A101506

Adjacent sequences:  A079350 A079351 A079352 * A079354 A079355 A079356

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 14 2003

STATUS

approved

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Last modified June 18 02:02 EDT 2013. Contains 226327 sequences.