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 A091129 Number of primes of the form 8k+7 less than 10^n. 4
 1, 6, 43, 308, 2399, 19669, 166237, 1440406, 12711702, 113766208, 1029523130, 9401993203, 86516416092, 801235499451 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Computed by T. D. Noe, Dec 19 2003. LINKS Bernhard Helmes, Distribution of Primes Eric Weisstein's World of Mathematics, Modular Prime Counting Function MATHEMATICA p = Select[Table[8 i + 7, {i, 0, 10^7}], PrimeQ[#] &]; Table[Count[p, x_ /; x < 10^n], {n, 7}] (* Robert Price, May 28 2019 *) CROSSREFS Cf. A091126, A091127, A091128. Sequence in context: A099322 A014989 A015552 * A091128 A349302 A025594 Adjacent sequences:  A091126 A091127 A091128 * A091130 A091131 A091132 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 Bernhard Helmes (pi(AT)devalco.de), Apr 21 2010 STATUS approved

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Last modified May 25 16:14 EDT 2022. Contains 354071 sequences. (Running on oeis4.)