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A064151 Number of primes < n^n. 2
0, 2, 9, 54, 445, 4821, 65685, 1077871, 20700806, 455052511, 11262113374, 309787170203, 9373678643933, 309378125685426, 11059576578724264, 425656284035217743, 17547676024364306476, 771403526860478324343 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..18.

Index entries for sequences related to numbers of primes in various ranges

Tomas Oliveira e Silva, Tables of values of pi(x) and of pi2(x) [From Donovan Johnson, Oct 14 2010]

FORMULA

a(n) = A000720(A000312(n)). - Michel Marcus, Aug 29 2014

CROSSREFS

Sequence in context: A222014 A127128 A254795 * A075679 A001757 A078455

Adjacent sequences:  A064148 A064149 A064150 * A064152 A064153 A064154

KEYWORD

more,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Sep 13 2001

EXTENSIONS

a(13)-a(15) from Donovan Johnson, Oct 14 2010

a(16) from Jens Kruse Andersen, Jul 29 2014

a(17)-a(18) from Henri Lifchitz, Aug 29 2014

STATUS

approved

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Last modified March 3 10:00 EST 2015. Contains 255152 sequences.