A096723 - OEIS

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A096723

Numbers n such that 3^n has the form 2p-+1 where p is prime.

1, 2, 3, 4, 7, 13, 16, 32, 64, 71, 103, 541, 1091, 1367, 1627, 4177 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`For the corresponding primes p see A088553.`
	LINKS	`Table of n, a(n) for n=1..16.`
	MATHEMATICA	`Select[Range[4200], Or@@PrimeQ[(3^#+{1, -1})/2]&] (* Harvey P. Dale, Mar 05 2013 *)`
	CROSSREFS	`Sequence in context: A200088 A004783 A031149 * A137495 A099779 A000690` `Adjacent sequences: A096720 A096721 A096722 * A096724 A096725 A096726`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy, Jul 05 2004`
	EXTENSIONS	`More terms from Ray Chandler, Jul 09 2004`
	STATUS	`approved`

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Last modified May 22 21:43 EDT 2013. Contains 225583 sequences.