id:A065915 - OEIS Search Results

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Numerator[DivisorSigma[1,8*n^2]/DivisorSigma[1,4*n^2]].

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15, 63, 15, 255, 15, 63, 15, 1023, 15, 63, 15, 255, 15, 63, 15, 4095, 15, 63, 15, 255, 15, 63, 15, 1023, 15, 63, 15, 255, 15, 63, 15, 16383, 15, 63, 15, 255, 15, 63, 15, 1023, 15, 63, 15, 255, 15, 63, 15, 4095, 15, 63, 15, 255, 15, 63, 15, 1023, 15, 63, 15, 255, 15, 63 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`sigma[72]/sigma[36] = 15/7; The sequence is not periodic,values of numerators are always -1+2^s.`
	CROSSREFS	`A000203` `Sequence in context: A072201 A067572 A066584 this_sequence A062965 A104473 A135972` `Adjacent sequences: A065912 A065913 A065914 this_sequence A065916 A065917 A065918`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Nov 28 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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