id:A067886 - OEIS Search Results

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2^n+1 and 2^n-1 have the same number of distinct prime factors.

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2, 3, 6, 9, 11, 14, 15, 18, 21, 23, 27, 29, 33, 42, 47, 51, 53, 54, 57, 69, 71, 73, 74, 81, 82, 86, 95, 101, 105, 111, 113, 114, 115, 121, 129, 130, 138, 141, 142, 165, 167, 169, 179, 181, 199, 203, 209, 213, 230, 233, 235, 243, 250 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`n such that omega(2^n+1)=omega(2^n-1)`
	CROSSREFS	`Adjacent sequences: A067883 A067884 A067885 this_sequence A067887 A067888 A067889` `Sequence in context: A127590 A118730 A097384 this_sequence A057127 A007780 A018537`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 02 2002`
	EXTENSIONS	`More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 14 2002`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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