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A091117 Number of primes of the form 5k+2 less than 10^n. 0
2, 7, 47, 309, 2412, 19622, 166212, 1440496, 12712315, 113764040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

CROSSREFS

Sequence in context: A054555 A072287 A276649 * A056854 A117141 A125813

Adjacent sequences:  A091114 A091115 A091116 * A091118 A091119 A091120

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 9 10:23 EST 2016. Contains 278971 sequences.