id:A089623 - OEIS Search Results

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Numbers n such that n^2 + 2n - 1 is prime.

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2, 4, 6, 8, 12, 14, 18, 20, 26, 28, 32, 34, 36, 42, 46, 48, 54, 60, 62, 68, 70, 74, 76, 88, 96, 102, 106, 116, 118, 120, 126, 130, 134, 138, 144, 154, 160, 168, 172, 176, 182, 190, 204, 210, 216, 222, 230, 232, 236, 238, 246, 252, 256, 258, 264, 266, 272, 278, 284 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988` `Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997`
	FORMULA	`a(n) = 2*A088572(n).`
	CROSSREFS	`Cf. A088572.` `Sequence in context: A043765 A043569 A010063 this_sequence A089681 A057220 A082742` `Adjacent sequences: A089620 A089621 A089622 this_sequence A089624 A089625 A089626`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Dec 31 2003`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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