A084713 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A084713

Smallest prime of the form (2n-1)^k + 2, or 0 if no such number exists.

3, 5, 7, 0, 11, 13, 0, 17, 19, 0, 23, 952809757913929, 0, 29, 31, 0, 1091, 37, 0, 41, 43, 0, 47 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`a(3n+1) = 0, a(24) = 47^113 - 2 is a 189-digit number.`
	LINKS	`Table of n, a(n) for n=1..23.`
	EXAMPLE	`a(12) = 952809757913927 = 23^11 + 2.`
	CROSSREFS	`Cf. A084714.` `Sequence in context: A223174 A225401 A085090 * A162538 A324990 A084712` `Adjacent sequences: A084710 A084711 A084712 * A084714 A084715 A084716`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy, Jun 10 2003`
	EXTENSIONS	`Edited by Robert G. Wilson v, Jun 11 2003`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 28 19:31 EST 2022. Contains 359109 sequences. (Running on oeis4.)