A067160 - OEIS

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A067160

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

1, 13, 65, 157, 173, 193, 1093, 1201, 1843, 2231, 2753, 3665, 12707, 13829, 15269, 19549, 19813, 20003, 31601, 32069, 32201, 34001, 58091, 72971, 77681, 80745, 91505, 112241, 129899, 153409, 153851, 180521, 187777, 200413, 250961, 261313 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Are there any even terms in the sequence?`
	CROSSREFS	`Cf. A066175.` `Sequence in context: A010820 A022705 A153793 * A147067 A147075 A109727` `Adjacent sequences: A067157 A067158 A067159 * A067161 A067162 A067163`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 19 2002`
	EXTENSIONS	`Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Feb 20 2002`

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Last modified February 16 18:43 EST 2012. Contains 205939 sequences.