id:A061555 - OEIS Search Results

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Integer part of sigma(n!)/n!.

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1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=Floor[DivisorSigma[1, n! ]/n! ]=Floor[A000203(A000142(n)]`
	EXAMPLE	`With increasing n, a(n) goes to infinity.`
	CROSSREFS	`A000142, A000203.` `Adjacent sequences: A061552 A061553 A061554 this_sequence A061556 A061557 A061558` `Sequence in context: A122027 A112751 A091194 this_sequence A071626 A106457 A103128`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), May 17 2001`

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Last modified May 22 15:55 EDT 2008. Contains 140006 sequences.

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