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Smallest number which when iterated n times under A003285 gives a square.
1

%I #8 Aug 17 2024 22:42:42

%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