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A093401 Primes of the form 20*R_n + 9, where R_n is the repunit (A002275) of length n. +0
2
29, 229, 22229, 22222222222229 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Cf. A056678 (corresponding n).

Sequence in context: A042638 A142066 A091631 this_sequence A042636 A091630 A027112

Adjacent sequences: A093398 A093399 A093400 this_sequence A093402 A093403 A093404

KEYWORD

nonn

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 28 2004

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

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