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A091117 Number of primes of the form 5k+2 less than 10^n. +0
1
2, 7, 47, 309, 2412, 19622, 166212, 1440496, 12712315, 113764040 (list; graph; listen)
OFFSET

1,1

COMMENT

Computed by T. D. Noe (noe(AT)sspectra.com), Dec 19, 2003.

LINKS

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

CROSSREFS

Sequence in context: A116892 A054555 A072287 this_sequence A056854 A117141 A125813

Adjacent sequences: A091114 A091115 A091116 this_sequence A091118 A091119 A091120

KEYWORD

nonn,more

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Dec 19, 2003

EXTENSIONS

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

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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