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%I #27 Apr 18 2018 19:58:12
%S 0,2,9,54,445,4821,65685,1077871,20700806,455052511,11262113374,
%T 309787170203,9373678643933,309378125685426,11059576578724264,
%U 425656284035217743,17547676024364306476,771403526860478324343,36020106660104388871845
%N Number of primes < n^n.
%H Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/primes.html">Tables of values of pi(x) and of pi2(x)</a> [_Donovan Johnson_, Oct 14 2010]
%H <a href="/index/Pri#primepop">Index entries for sequences related to numbers of primes in various ranges</a>
%F a(n) = A000720(A000312(n)). - _Michel Marcus_, Aug 29 2014
%o (PARI) a(n) = primepi(n^n); \\ _Michel Marcus_, Apr 18 2018
%Y Cf. A000720, A000312.
%K more,nonn
%O 1,2
%A _Jason Earls_, Sep 13 2001
%E a(13)-a(15) from _Donovan Johnson_, Oct 14 2010
%E a(16) from _Jens Kruse Andersen_, Jul 29 2014
%E a(17)-a(18) from _Henri Lifchitz_, Aug 29 2014
%E a(19) from _Chai Wah Wu_, Apr 18 2018
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