A157834 - OEIS

This site is supported by donations to The OEIS Foundation.

A157834

Numbers n such that 3n-2 and 3n+2 are both prime.

3, 5, 7, 13, 15, 23, 27, 33, 35, 37, 43, 55, 65, 75, 77, 93, 103, 105, 117, 127, 133, 147, 153, 155, 163, 167, 205, 215, 225, 247, 253, 257, 275, 285, 287, 293, 295, 303, 313, 323, 337, 363, 365, 405, 427, 433, 435, 475, 477, 483, 495, 497, 517 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`Intersection of A024893 and A153183.` `a(n) = A029708(n)/3. [From Zak Seidov (zakseidov(AT)yahoo.com), Aug 07 2009]`
	EXAMPLE	`15 +/- 2 = 43,47 (both prime).`
	PROG	`(MAGMA) [n: n in [1..1000]\|IsPrime(3n-2)and IsPrime(3n+2)][From Vincenzo Librandi, Dec 13 2010]`
	CROSSREFS	`A024893 (Numbers n such that 3n+2 is prime), A153183 (Numbers n such that 3n-2 is prime).` `Sequence in context: A007591 A097687 A032911 A192110 A008996 A031163` `Adjacent sequences: A157831 A157832 A157833 * A157835 A157836 A157837`
	KEYWORD	`nonn`
	AUTHOR	`Kyle D. Balliet (kdballie(AT)bloomu.edu), Mar 07 2009`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 08:19 EST 2012. Contains 205728 sequences.