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%I #5 Feb 18 2023 15:10:55
%S 1,2,3,19,166,8269,11568181
%N Smallest number which when iterated n times under A003285 gives a square.
%C Smallest m such that A003285(A003285(..(m))) = square with n iterations.
%e A003285(A003285(3)))=1, 3 is the smallest number requiring 2 iterations to reach a square number, so a(2)=3.
%Y Cf. A003285.
%K more,nonn
%O 0,2
%A _Naohiro Nomoto_, Nov 08 2001
%E a(6) from _Sean A. Irvine_, Feb 18 2023
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