id:A111974 - OEIS Search Results

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A111974

Primes of the form 2*3^n+1.

+0
2

3, 7, 19, 163, 487, 1459, 39367, 86093443, 258280327, 411782264189299, 116299474006080119380780339, 3140085798164163223281069127, 84782316550432407028588866403, 20602102921755074907947094535687 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[2*3^Range[100]+1, PrimeQ]`
	CROSSREFS	`Cf. A003306 (n such that 23^n+1 is prime), A003307 (n such that 23^n-1 is prime).` `Sequence in context: A075487 A118128 A113875 this_sequence A066315 A058499 A003097` `Adjacent sequences: A111971 A111972 A111973 this_sequence A111975 A111976 A111977`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Aug 24 2005`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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