A089692 - OEIS

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A089692

a(n)=phi(2n)/2^omega(n).

1, 1, 1, 2, 2, 1, 3, 4, 3, 2, 5, 2, 6, 3, 2, 8, 8, 3, 9, 4, 3, 5, 11, 4, 10, 6, 9, 6, 14, 2, 15, 16, 5, 8, 6, 6, 18, 9, 6, 8, 20, 3, 21, 10, 6, 11, 23, 8, 21, 10, 8, 12, 26, 9, 10, 12, 9, 14, 29, 4, 30, 15, 9, 32, 12, 5, 33, 16, 11, 6, 35, 12, 36, 18, 10, 18, 15, 6, 39, 16, 27, 20, 41, 6, 16, 21 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	FORMULA	`a(n)=A062570(n)/A034444(n)` `Multiplicative with a(2^e) = 2^(e-1) and a(p^e) = (p^e-p^(e-1))/2 for an odd prime p. - Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 15 2004`
	CROSSREFS	`Sequence in context: A105809 A091594 A118032 * A066201 A193820 A123956` `Adjacent sequences: A089689 A089690 A089691 * A089693 A089694 A089695`
	KEYWORD	`nonn,mult`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 06 2004`

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Last modified February 16 21:30 EST 2012. Contains 205971 sequences.