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A091163 Number of primes of the form 12k + 7 less than 10^n. 4
1, 6, 44, 311, 2410, 19667, 166183, 1440496, 12711847, 113763697 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Cf. A091161 + A091162 + A091163 + A091164 +2 (for 2 & 3) = A006880.

Sequence in context: A203601 A091162 A156002 * A189800 A227665 A102591

Adjacent sequences:  A091160 A091161 A091162 * A091164 A091165 A091166

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jan 12 2004

STATUS

approved

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Last modified October 1 07:48 EDT 2020. Contains 337442 sequences. (Running on oeis4.)