id:A116045 - OEIS Search Results

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n+phi(n)+phi(phi(n)) is a prime.

+0
2

1, 4, 5, 9, 13, 17, 19, 21, 25, 33, 35, 39, 41, 43, 49, 61, 75, 79, 85, 87, 95, 101, 121, 133, 137, 141, 153, 155, 159, 163, 165, 169, 177, 181, 193, 199, 201, 203, 207, 213, 215, 231, 233, 245, 251, 257, 259, 265, 267, 271, 277, 291, 299, 307, 309, 337, 339 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`13+phi(13)+phi(phi(13)) = 29.`
	CROSSREFS	`Cf. A068080.` `Sequence in context: A034705 A006844 A022425 this_sequence A096818 A038099 A120740` `Adjacent sequences: A116042 A116043 A116044 this_sequence A116046 A116047 A116048`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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