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A093943 Primes of the form 8*10^k + 7*R_k, where R_k is the repunit (A002275) of length k. 1
877, 8777777777, 8777777777777777, 877777777777777777777777777777777, 877777777777777777777777777777777777777, 877777777777777777777777777777777777777777777777777777777777777777 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Cf. A002275, A056724 (corresponding k).
Sequence in context: A208787 A208587 A208472 * A252437 A129313 A063051
KEYWORD
nonn
AUTHOR
Rick L. Shepherd, Apr 17 2004
STATUS
approved

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Last modified February 27 18:40 EST 2024. Contains 370378 sequences. (Running on oeis4.)