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%I #10 Sep 24 2018 16:53:14
%S 1,1,3,16,25,216,343,4096,6561,10000,14641,248832,371293,7529536,
%T 11390625,16777216,24137569,612220032,893871739,25600000000,
%U 37822859361,54875873536,78310985281,2641807540224,3814697265625,5429503678976
%N a(n) = n^(pi(n-1)).
%C pi(n) (A000720) is the number of prime numbers less than or equal to n.
%e a(5)=25 because a(5)= 5^(pi(4))= 5^2= 25
%e If n=10, m=4, so 10^4 = 10000.
%t Table[n^PrimePi[n - 1], {n, 30}]
%Y Cf. A000720.
%K nonn
%O 1,3
%A _Parthasarathy Nambi_, Jan 15 2005
%E Extended by _Ray Chandler_, Jan 18 2005
%E Edited by _N. J. A. Sloane_ at the suggestion of _Andrew S. Plewe_, Jun 16 2007
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