id:A067709 - OEIS Search Results

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

+0
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2, 4, 16, 18, 64, 100, 450, 516, 1458, 4096, 4624, 13932, 14406, 20124, 21780, 28900, 29262, 29616, 36450, 45996, 62500, 65536, 92778, 95916, 106092, 106308, 114630, 114930, 121872, 125652, 130050, 140130, 145794, 149124, 160986, 179562, 185100 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Every even superperfect number (A019279) is a term of the sequence. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Feb 11 2002`
	CROSSREFS	`Sequence in context: A067846 A135569 A131560 this_sequence A102545 A125085 A045521` `Adjacent sequences: A067706 A067707 A067708 this_sequence A067710 A067711 A067712`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 05 2002`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Feb 11 2002`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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