A103071 - OEIS

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A103071

Numbers n such that 8*10^n + R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.

1, 10, 24, 199, 745, 7753, 17938, 21319, 24948, 26119, 29454 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Also numbers n such that (73*10^n+17)/9 is prime.`
	LINKS	`Makoto Kamada, Factorizations of 811...113.` `Index entries for primes involving repunits.`
	MATHEMATICA	`Do[ If[ PrimeQ[(73*10^n + 17)/9], Print[n]], {n, 0, 10000}]`
	CROSSREFS	`Sequence in context: A058504 A126911 A135285 * A057462 A180043 A048195` `Adjacent sequences: A103068 A103069 A103070 * A103072 A103073 A103074`
	KEYWORD	`more,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005`
	EXTENSIONS	`a(7)-a(11) from Kamada data by Robert Price (pamandbobprice(AT)yahoo.com), Dec 14 2010`

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Last modified February 14 05:53 EST 2012. Contains 205570 sequences.