This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A165121 #4 Mar 30 2012 17:28:44 %S A165121 16,320,2256,3712,34960,183696,3496800,31596672,278474880,2066242576, %T A165121 2516902752,26531651360,167365651216,203869268832,211282856832, %U A165121 2145190286000,2184410558000,16513410921312,176898519791120 %N A165121 Consider the base-9 Kaprekar map n->K(n) defined in A165110. Sequence gives least elements of each cycle of length > 1. %C A165121 Initial terms in base 9: 17, 385, 3076, 5074, 52854, 308876, 6518633, 65407433, 641888643, 5288888854. %H A165121 Joseph Myers, <a href="/A165121/b165121.txt">Table of n, a(n) for n=1..1282</a> %H A165121 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165121 Cf. A165110, A165122, A165114, A165115, A165119, A165117, A165128. %Y A165121 In other bases: Empty (base 2), A165004 (base 3), A165023 (base 4), A165043 (base 5), A165062 (base 6), A165082 (base 7), A165101 (base 8), A164720 (base 10). %K A165121 base,nonn %O A165121 1,1 %A A165121 _Joseph Myers_, Sep 04 2009