A058825 - OEIS

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A058825

Numbers which are both totients and cototients.

1, 2, 4, 6, 8, 12, 16, 18, 20, 22, 24, 28, 30, 32, 36, 40, 42, 44, 46, 48, 54, 56, 60, 64, 66, 70, 72, 78, 80, 82, 84, 88, 92, 96, 102, 104, 106, 108, 110, 112, 120, 126, 128, 132, 136, 138, 140, 144, 148, 150, 156, 160, 162, 164, 166, 168, 176, 178, 180, 184, 190 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`Intersection[A002202, A051953]`
	EXAMPLE	`24 is here because 24=Phi(72)=44-Phi(44)=44-20=cototient(44)`
	CROSSREFS	`Cf. A000010, A051953, A005277, A005278, A002020, A058763.` `Sequence in context: A094109 A090404 A015937 * A087086 A103288 A125225` `Adjacent sequences: A058822 A058823 A058824 * A058826 A058827 A058828`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jan 04 2001`

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Last modified February 15 21:04 EST 2012. Contains 205854 sequences.