Smallest unhappy number that takes n steps to reach any of the unhappy cycle (4, 16, 37, 58, 89, 145, 42, 20) under iteration of sum of squares of digits map.
4, 2, 11, 15, 5, 3, 14, 45, 36, 6, 112, 269, 1599
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Mon Sep 26 18:28:28 CEST 2011 [seqfan] Re: broken links to pages from W. Schneider