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Let p(i) denote the i-th prime. If 2 p(n) - p(n+1) is a prime, say p(n-i), then we say that p(n) has level(1,i). Sequence gives primes of level(1,2).

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23, 47, 73, 233, 353, 647, 1097, 1283, 1433, 1453, 1493, 1613, 1709, 1889, 2099, 2161, 2383, 2621, 2693, 2713, 3049, 3533, 3559, 3923, 4007, 4133, 4643, 4793, 4937, 5443, 5743, 6101, 7213, 7309, 7351, 7561, 7621, 7829, 8179, 8237, 8719, 8849, 9109, 9343 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Remi Eismann, Table of n, a(n) for n = 1..10000`
	EXAMPLE	`29=223-17, 2179=22161-2143, 5749=2*5743-5737`
	CROSSREFS	`Cf. A117563.` `Adjacent sequences: A117873 A117874 A117875 this_sequence A117877 A117878 A117879` `Sequence in context: A134517 A001124 A139501 this_sequence A090191 A054821 A039374`
	KEYWORD	`nonn`
	AUTHOR	`Remi Eismann (reismann(AT)free.fr), May 02 2006`
	EXTENSIONS	`Edited by njas, May 14 2006` `More terms from Remi EISMANN (reismann(AT)free.fr), May 25 2006`

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Last modified May 12 19:26 EDT 2008. Contains 139661 sequences.

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