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%I #13 Apr 23 2013 11:15:47
%S 16,81,256,512,625,2401,6561,14641,19683,28561,83521,130321,279841,
%T 390625,707281,923521,1874161,1953125,2825761,3418801,4879681,5764801,
%U 7890481,12117361,13845841,20151121,25411681,28398241,33554432,38950081,40353607,47458321
%N Numbers of the form p^q^r, for p,q,r primes.
%C Subset of A217261. Sequence suggested by _Kevin L. Schwartz_ in a Facebook discussion.
%e a(1) = 2^2^2 = 16;
%e a(2) = 3^2^2 = 81;
%e a(3) = 2^2^3 = 256;
%e a(4) = 2^3^2 = 512;
%e a(5) = 5^2^2 = 625.
%Y Cf. A000040, A000961, A217261.
%K nonn,easy
%O 1,1
%A _Jonathan Vos Post_, Mar 20 2013
%E More terms from _Alois P. Heinz_, Mar 20 2013
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