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%I A061907 #2 Oct 27 2023 22:00:47
%S A061907 2,11,20,101,110,134,136,163,172,197,200,217,233,242,244,262,278,287,
%T A061907 296,298,307,313,314,316,343,359,386,397,406,413,422,424,431,433,442,
%U A061907 458,467,469,476,478,487,514,523,541,577,583,586,593,604,613,614,622
%N A061907 The iterative cycle: n -> sum of digits of n^2 has only four distinct elements.
%e A061907 a(2) = 4 since 2 -> 4 -> 1+6 = 7 -> 4+9 = 13 -> 1+6+9 = 16 -> 2+5+6 = 13, thus {4,7,13,16} are the distinct elements of the iterative cycle of 2.
%Y A061907 Cf. A007953, A004159, A061903 - A061910.
%K A061907 nonn,base
%O A061907 1,1
%A A061907 _Asher Auel_, May 17 2001

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