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A093632 Primes of the form 7*10^n + R_n, where R_n is the repunit (A002275) of length n. +0
1
7, 71, 71111111, 71111111111111111111111111111111111111111111111111111111 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Cf. A056719 (corresponding n).

Sequence in context: A113053 A022503 A063861 this_sequence A077332 A005413 A137730

Adjacent sequences: A093629 A093630 A093631 this_sequence A093633 A093634 A093635

KEYWORD

nonn

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 06 2004

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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