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A093176 Primes of the form 70*R_n + 1, where R_n is the repunit (A002275) of length n. 6
71, 7777777777771, 77777777777777777771, 77777777777777777777771, 7777777777777777777777777777771, 7777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777771 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Primes of the form (7*10^n-61)/9 [From Vincenzo Librandi, Nov 16 2010]

CROSSREFS

Cf. A056688 (corresponding n).

Sequence in context: A078915 A144242 A144360 * A057384 A036186 A036206

Adjacent sequences:  A093173 A093174 A093175 * A093177 A093178 A093179

KEYWORD

nonn

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 27 2004

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Last modified February 17 10:05 EST 2012. Contains 206009 sequences.