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Prime numbers at large subscripts: a(n) = prime(n^n).
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%I #10 Nov 28 2017 08:31:43

%S 2,2,7,103,1619,28687,567871,12579617,310248241,8448283757,

%T 252097800623,8187297276401,287629183566841,10871811891162227,

%U 440023773804299591

%N Prime numbers at large subscripts: a(n) = prime(n^n).

%C The n^n-th prime. - _Hugo Pfoertner_, Nov 28 2017

%H Kim Walisch, <a href="https://github.com/kimwalisch/primecount">Fast C++ prime counting function implementation</a>.

%F a(n) = A000040(A000312(n)).

%e a(10) = prime(10000000000) = 252097800623.

%Y Cf. A000040, A000312, A002110, A000142, A000079, A033844.

%K hard,nonn

%O 0,1

%A _Labos Elemer_, Jul 09 2001

%E a(12)-a(14) from _Hugo Pfoertner_, Nov 28 2017