id:A112587 - OEIS Search Results

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Numbers m such that phi(m) <= 2*tau(m), where phi=A000010 and tau=A000005.

+0
3

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 24, 28, 30, 36, 40, 42, 48, 60, 72, 84, 90, 120 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Complement of A112588.`
	LINKS	`Eric Weisstein's World of Mathematics, Totient Function` `Eric Weisstein's World of Mathematics, Divisor Function`
	CROSSREFS	`Cf. A020488.` `Sequence in context: A080671 A124455 A072378 this_sequence A141820 A068090 A094222` `Adjacent sequences: A112584 A112585 A112586 this_sequence A112588 A112589 A112590`
	KEYWORD	`nonn,fini,full`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 14 2005`

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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.