id:A116026 - OEIS Search Results

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phi(n) plus n gives a semiprime (A001358).

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4, 5, 9, 10, 11, 13, 17, 21, 26, 29, 30, 43, 45, 47, 49, 55, 57, 58, 61, 66, 67, 70, 71, 73, 75, 82, 87, 89, 99, 101, 102, 103, 106, 107, 109, 111, 115, 119, 123, 127, 129, 130, 146, 151, 153, 154, 175, 181, 182, 183, 185, 190, 191, 195, 197, 202, 203, 205, 207 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`phi(101)+101=201=3*67.`
	CROSSREFS	`Cf. A001358, A116015.` `Adjacent sequences: A116023 A116024 A116025 this_sequence A116027 A116028 A116029` `Sequence in context: A093667 A030415 A120516 this_sequence A115915 A007536 A064801`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

AT&T Labs Research