id:A069914 - OEIS Search Results

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Sum_{d|n} (d-1)*sigma(n/d).

+0
1

0, 1, 2, 6, 4, 15, 6, 23, 16, 27, 10, 64, 12, 39, 42, 72, 16, 98, 18, 110, 60, 63, 22, 213, 48, 75, 84, 156, 28, 245, 30, 201, 96, 99, 102, 380, 36, 111, 114, 357, 40, 345, 42, 248, 248, 135, 46, 618, 96, 278, 150, 294, 52, 478, 162, 501, 168, 171, 58, 924, 60, 183 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n) = A060640(n) - A007429(n).`
	CROSSREFS	`Cf. A000203, A006579.` `Sequence in context: A100851 A064462 A111807 this_sequence A130190 A110346 A095754` `Adjacent sequences: A069911 A069912 A069913 this_sequence A069915 A069916 A069917`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), May 04 2002`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.

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