id:A103933 - OEIS Search Results

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Denominators of first difference of squares of harmonic numbers A001008/A002805.

+0
3

1, 4, 9, 48, 150, 90, 490, 2240, 11340, 2520, 152460, 83160, 2342340, 2522520, 540540, 11531520, 104144040, 110270160, 737176440, 775975200, 162954792, 56904848, 1368302936, 2141691552, 111546435000, 116008292400, 1084231348200 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`The corresponding numerators are given in A103932. For the rationals see the link there.`
	FORMULA	`a(n)=numerator(r(n)), with the rationals r(n)=H(n)^2-H(n-1)^2 where H(n)= A001008(n)/A002805(n), n>=1, H(0):=0.`
	CROSSREFS	`Adjacent sequences: A103930 A103931 A103932 this_sequence A103934 A103935 A103936` `Sequence in context: A048892 A108849 A025558 this_sequence A013495 A115687 A115711`
	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 October 6 12:54 EDT 2008. Contains 144667 sequences.

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