id:A078773 - OEIS Search Results

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Prime preceding phi(n).

+0
1

0, 0, 2, 2, 3, 2, 5, 3, 5, 3, 7, 3, 11, 5, 7, 7, 13, 5, 17, 7, 11, 7, 19, 7, 19, 11, 17, 11, 23, 7, 29, 13, 19, 13, 23, 11, 31, 17, 23, 13, 37, 11, 41, 19, 23, 19, 43, 13, 41, 19, 31, 23, 47, 17, 37, 23, 31, 23, 53, 13, 59, 29, 31, 31, 47, 19, 61, 31, 43, 23, 67, 23, 71, 31, 37, 31 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`phi(10)=4, hence a(10)=3`
	PROGRAM	`(PARI) for (n=1, 100, print1(precprime(eulerphi(n))", "))`
	CROSSREFS	`Sequence in context: A025478 A084371 A025476 this_sequence A111089 A051664 A029656` `Adjacent sequences: A078770 A078771 A078772 this_sequence A078774 A078775 A078776`
	KEYWORD	`nonn`
	AUTHOR	`Jon Perry (perry(AT)globalnet.co.uk), Jan 09 2003`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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