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A091122 Number of primes of the form 7k+3 less than 10^n. 5
1, 5, 30, 209, 1613, 13105, 110815, 960213, 8475123, 75843438, 686338138, 6267994788, 57677618350, 534157031248 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Computed by T. D. Noe, Dec 19 2003

LINKS

Table of n, a(n) for n=1..14.

Eric Weisstein's World of Mathematics, Modular Prime Counting Function

CROSSREFS

Cf. A091120, A091121, A091123, A091124, A091125.

Sequence in context: A082301 A144180 A222050 * A029587 A001720 A051829

Adjacent sequences:  A091119 A091120 A091121 * A091123 A091124 A091125

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Dec 19 2003

EXTENSIONS

a(10) from Robert G. Wilson v, Dec 22 2003

a(11)-a(14) from Hiroaki Yamanouchi, Oct 14 2014

STATUS

approved

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Last modified January 23 00:56 EST 2019. Contains 319365 sequences. (Running on oeis4.)