id:A067704 - OEIS Search Results

Search: id:A067704

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Numbers n such that phi(sigma(n))=2*phi(n).

+0
4

2, 6, 8, 9, 24, 28, 70, 78, 128, 140, 222, 234, 280, 312, 350, 366, 384, 438, 496, 525, 666, 864, 888, 910, 918, 936, 942, 1036, 1098, 1158, 1232, 1314, 1400, 1464, 1575, 1662, 1708, 1752, 1824, 1836, 1878, 1900, 1938, 2044, 2382, 2480, 2526, 2590, 2664 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`M. F. Hasler, Table of n, a(n) for n=1,...,110.`
	CROSSREFS	`Cf. A137815, A137816.` `Sequence in context: A047278 A107737 A045138 this_sequence A129459 A028772 A121744` `Adjacent sequences: A067701 A067702 A067703 this_sequence A067705 A067706 A067707`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 05 2002`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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