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A093172 Primes of the form 90*R_n + 7, where R_n is the repunit (A002275) of length n. +0
1
7, 97, 997, 99999999999999997 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Cf. A056662 (corresponding n).

Sequence in context: A068694 A158579 A003618 this_sequence A074110 A155644 A011943

Adjacent sequences: A093169 A093170 A093171 this_sequence A093173 A093174 A093175

KEYWORD

nonn,more

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 26 2004

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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