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A091119 Number of primes of the form 6k+5 less than 10^n. 1
1, 12, 86, 616, 4806, 39265, 332383, 2880936, 25424819, 227529386 (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..10.

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

FORMULA

a(n) = A006880(n) - 2 - A091115(n). - R. J. Mathar, Jul 20 2007

CROSSREFS

Cf. A091118. Equals -1 + A091116.

Sequence in context: A225785 A098206 A104911 * A243248 A046023 A183721

Adjacent sequences:  A091116 A091117 A091118 * A091120 A091121 A091122

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Dec 19 2003

EXTENSIONS

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

STATUS

approved

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Last modified December 5 16:08 EST 2016. Contains 278770 sequences.