id:A077454 - OEIS Search Results

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sigma(n^3,3)/sigma(n^3,1).

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1, 39, 511, 2359, 12621, 19929, 101179, 149943, 368089, 492219, 1611831, 1205449, 4457701, 3945981, 6449331, 9588151, 22722609, 14355471, 44576623, 29772939, 51702469, 62861409, 141611691, 76620873, 196890121, 173850339, 268218727 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=A001158(n^3)/A000203(n^3)`
	PROGRAM	`(PARI) a(n)=sumdiv(n^3, d, d^3)/sigma(n^3)`
	CROSSREFS	`Cf. A057660.` `Adjacent sequences: A077451 A077452 A077453 this_sequence A077455 A077456 A077457` `Sequence in context: A101627 A070146 A061169 this_sequence A034187 A059609 A010955`
	KEYWORD	`nonn,mult`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 30 2002`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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