id:A077449 - OEIS Search Results

Search: id:A077449

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Numbers n such that sum( d|n : mu(phi(d))) = 0.

+0
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3, 6, 15, 30, 31, 39, 43, 51, 57, 62, 67, 71, 75, 78, 79, 86, 87, 102, 103, 111, 114, 123, 131, 134, 139, 142, 147, 150, 155, 158, 159, 174, 183, 191, 195, 206, 215, 219, 222, 223, 239, 246, 255, 262, 267, 278, 279, 283, 285, 291, 294, 303, 310, 311, 318, 327 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) seems to be asymptotic to c*n where c is around 5.47...`
	CROSSREFS	`Sequence in context: A116696 A000220 A092641 this_sequence A152232 A141023 A126982` `Adjacent sequences: A077446 A077447 A077448 this_sequence A077450 A077451 A077452`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 30 2002`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

AT&T Labs Research