id:A103931 - OEIS Search Results

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Denominators of squares of harmonic numbers A001008/A002805.

+0
2

1, 4, 36, 144, 3600, 400, 19600, 78400, 6350400, 6350400, 768398400, 768398400, 129859329600, 129859329600, 129859329600, 519437318400, 150117385017600, 16679709446400, 6021375110150400, 240855004406016, 26761667156224 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The corresponding numerators are given in A103930. For the rational see the link there.`
	FORMULA	`a(n)=denominator(H(n)^2), with the harmonic numbers H(n)=A001008(n)/A002805(n), n>=1.`
	CROSSREFS	`Sequence in context: A035287 A083223 A102263 this_sequence A068589 A120077 A007407` `Adjacent sequences: A103928 A103929 A103930 this_sequence A103932 A103933 A103934`
	KEYWORD	`nonn,easy,frac`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Mar 24 2005`

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Last modified March 18 15:35 EDT 2010. Contains 173617 sequences.

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