id:A143393 - OEIS Search Results

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Least prime a(n) such that a(n)*(a(n)+p(n))-1 is prime with p(i)=i-th prime.

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2, 3, 2, 2, 3, 2, 2, 2, 5, 2, 3, 7, 3, 2, 2, 2, 7, 3, 2, 5, 2, 5, 3, 2, 2, 3, 3, 7, 5, 2, 2, 3, 2, 2, 5, 3, 2, 5, 2, 2, 5, 5, 11, 2, 2, 2, 3, 2, 2, 2, 11, 7, 5, 3, 7, 3, 2, 3, 2, 5, 2, 3, 2, 3, 3, 5, 11, 2, 3, 2, 2, 29, 3, 5, 2, 2, 37, 2, 5, 2, 11, 5, 3, 3, 2, 5, 5, 5, 23, 2, 2, 17, 2, 3, 7, 2, 2, 3, 2, 5, 2, 2 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Pierre CAMI, Table of n, a(n) for n = 1..12250`
	EXAMPLE	`2(2+2)-1=7 prime so a(1)=2 as p(1)=2` `2(2+3)-1=9 composite` `3*(3+3)-1=17 prime so a(2)=3 as p(2)=3`
	CROSSREFS	`Cf. A143394.` `Sequence in context: A128049 A104543 A054988 this_sequence A166497 A116909 A085239` `Adjacent sequences: A143390 A143391 A143392 this_sequence A143394 A143395 A143396`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierrecami(AT)tele2.fr), Aug 12 2008`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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