id:A034380 - OEIS Search Results

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Ratio of totient to Carmichael's lambda function.

+0
8

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

	OFFSET	`1,8`
	REFERENCES	`W. D. Banks and F. Luca, On integers with a special divisibility property, Archivum Mathematicum (BRNO) 42 (2006) pp 31-42.`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..10000`
	FORMULA	`a[A033948(n)]=1 [Banks & Luca]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 29 2007`
	MAPLE	`A034380 := n-> phi(n) / lambda(n);`
	CROSSREFS	`Cf. A000010, A002322, A033948.` `Sequence in context: A046072 A072273 A157230 this_sequence A077479 A070106 A109706` `Adjacent sequences: A034377 A034378 A034379 this_sequence A034381 A034382 A034383`
	KEYWORD	`nonn`
	AUTHOR	`Alex Fink (fink(AT)cadvision.com)`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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