id:A058934 - OEIS Search Results

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n is such that: 1. 1+2*5^i is prime or 2. nops(invphi(2*5^i))=2.

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1, 3, 13, 45, 105, 159, 297 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`a(3)=13 and 1+25^13=2441406251 is prime or invphi(25^13)={2441406251,4882812502}. For integers left out neither of these properties are satisfied.`
	CROSSREFS	`Sequence in context: A058407 A095863 A136520 this_sequence A141088 A115128 A140420` `Adjacent sequences: A058931 A058932 A058933 this_sequence A058935 A058936 A058937`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jan 12 2001`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.