id:A084220 - OEIS Search Results

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a(n)=sigma_6(n^2)/sigma_3(n^2).

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1, 57, 703, 3641, 15501, 40071, 117307, 233017, 512461, 883557, 1770231, 2559623, 4824613, 6686499, 10897203, 14913081, 24132657, 29210277, 47039023, 56439141, 82466821, 100903167, 148023723, 163810951, 242203001, 275002941, 373584043 (list; graph; listen)

	OFFSET	`1,2`
	PROGRAM	`(PARI) a(n)=sumdiv(n^2, d, d^6)/sumdiv(n^2, d, d^3)`
	CROSSREFS	`Cf. A057660.` `Sequence in context: A097200 A076459 A027143 this_sequence A060891 A098995 A008390` `Adjacent sequences: A084217 A084218 A084219 this_sequence A084221 A084222 A084223`
	KEYWORD	`nonn,mult`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 21 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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