id:A050855 - OEIS Search Results

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Numbers n such that 207*2^n-1 is prime.

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2, 9, 12, 17, 20, 21, 50, 53, 132, 168, 341, 360, 381, 501, 1065, 1169, 1545, 2109, 2520, 2661, 3149, 4077, 11252, 21588, 21692, 39509, 52685, 67196, 87708, 232436, 372312, 417818, 481385, 507833 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Also in the sequence: 643478 - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008`
	LINKS	`Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300` `Wilfrid Keller, List of primes k.2^n - 1 for k < 300` `Index entries for sequences of n such that k2^n-1 (or k2^n+1) is prime` `Kosmaj, Riesel list k<300.`
	CROSSREFS	`Sequence in context: A103008 A124742 A152003 this_sequence A031070 A109297 A048768` `Adjacent sequences: A050852 A050853 A050854 this_sequence A050856 A050857 A050858`
	KEYWORD	`hard,nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 29 1999`
	EXTENSIONS	`More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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