id:A050384 - OEIS Search Results

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Nonprimes such that n and phi(n) are relatively prime.

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	OFFSET	`1,2`
	COMMENT	`Also nonprimes n such that there is only one group of order n, i.e. A000001(n) = 1.` `Intersection of A018252 and A003277.` `Also numbers n such that n and A051953[n] are relatively prime (Labos E.).`
	LINKS	`T. D. Noe, Table of n, a(n) for n = 1..10000`
	CROSSREFS	`If the primes are included we get A003277. Cf. A000001, A000010 (phi).` `Sequence in context: A112147 A154369 A089966 this_sequence A142862 A053343 A068081` `Adjacent sequences: A050381 A050382 A050383 this_sequence A050385 A050386 A050387`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 15 1999.`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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