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 A175566 a(n) = the least prime p such that (2*k + 1)*p - 2*k, k=1..n are all prime. 3
 3, 3, 7, 1171, 64591, 25153801, 25153801, 4747505071 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS First primes p such that (2k+1)p-2k k=1..7 are 25153801,507079861,610817971,942962791,1040241511,1223511871,1797884761. First primes p such that (2k+1)p-2k k=1..8 are 4747505071,10817047081,21071155561,41279978041,44304317821, 49710893611,58845917971,79925475841,96466884361,106120099471,107001847261. LINKS CROSSREFS Cf. A088878 Prime numbers p such that 3p-2 is a prime. Sequence in context: A273043 A066142 A232459 * A248859 A171543 A079073 Adjacent sequences:  A175563 A175564 A175565 * A175567 A175568 A175569 KEYWORD nonn AUTHOR Zak Seidov, Jul 11 2010 STATUS approved

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Last modified August 1 08:54 EDT 2021. Contains 346385 sequences. (Running on oeis4.)