id:A067887 - OEIS Search Results

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Composite n such that phi(n+1)<phi(n).

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9, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 69, 75, 77, 81, 85, 87, 91, 93, 95, 99, 111, 115, 117, 119, 121, 123, 125, 129, 133, 135, 141, 143, 145, 147, 153, 155, 159, 161, 169, 171, 175, 177, 183, 185, 187, 189, 195, 201, 203, 205, 207, 209, 213 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`n such that omega(2^n+1)=omega(2^n-1)`
	CROSSREFS	`Sequence in context: A013338 A008847 A111171 this_sequence A138786 A139392 A091113` `Adjacent sequences: A067884 A067885 A067886 this_sequence A067888 A067889 A067890`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 02 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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