A089379 - OEIS

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A089379

Numbers n such that 10^n+n is prime.

1, 9, 69, 313, 451, 13807 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	EXAMPLE	`a(2)=9 because 10^9+9 is prime.`
	MATHEMATICA	`Do[If[Mod[n, 3]!=2&& PrimeQ[10^n+n], Print[n]], {n, 1, 15500, 2}] - Farideh Firoozbakht (mymontain(AT)yahoo.com), Jun 11 2006`
	CROSSREFS	`Cf. A110066.` `Sequence in context: A024119 A120306 A197425 * A193698 A188800 A072258` `Adjacent sequences: A089376 A089377 A089378 * A089380 A089381 A089382`
	KEYWORD	`nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Dec 27 2003`
	EXTENSIONS	`One more term from Farideh Firoozbakht (mymontain(AT)yahoo.com), Jun 11 2006`

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.