id:A073599 - OEIS Search Results

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Numbers n such that the denominator of sum(k=1,n,1/phi(k)) divides the denominator of H(n)=sum(k=1,n,1/k) the n-th harmonic number.

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1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 27, 28, 29, 30, 31, 32, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 72, 73, 74, 75, 76, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`It seems that for n large enough (1/2)* nLog(n) < a(n) < nLog(n)`
	CROSSREFS	`Sequence in context: A023841 A103681 A039265 this_sequence A039204 A039153 A039111` `Adjacent sequences: A073596 A073597 A073598 this_sequence A073600 A073601 A073602`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 29 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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