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Search: id:A093939
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A093939 Primes of the form 3*10^n + 7*R_n, where R_n is the repunit (A002275) of length n. +0
1
3, 37, 377777777777, 377777777777777777 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Cf. A056705 (corresponding n).

Sequence in context: A088098 A122787 A119448 this_sequence A129122 A002405 A050394

Adjacent sequences: A093936 A093937 A093938 this_sequence A093940 A093941 A093942

KEYWORD

nonn

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 17 2004

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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