id:A106630 - OEIS Search Results

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Numbers n such that (p(n)^2 - 1)/6 - p(n) is prime.

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7, 8, 12, 13, 17, 20, 24, 25, 28, 29, 32, 39, 42, 45, 52, 53, 58, 59, 63, 64, 67, 72, 75, 79, 83, 87, 88, 93, 100, 102, 114, 115, 125, 126, 127, 131, 139, 140, 144, 154, 159, 160, 173, 180, 190, 195, 219, 223, 232, 234, 240, 248, 253, 265, 278, 279, 284, 296, 299 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`(17^2 -1)/6 - 17 = 48 - 17 = 31 is prime, 17=p(7), so a(1)=7`
	CROSSREFS	`Sequence in context: A098731 A105740 A050796 this_sequence A050798 A057484 A050901` `Adjacent sequences: A106627 A106628 A106629 this_sequence A106631 A106632 A106633`
	KEYWORD	`nonn,new`
	AUTHOR	`Pierre CAMI (pierrecami(AT)tele2.fr), May 11 2005`
	EXTENSIONS	`a(12) corrected by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 13 2009`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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