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 A165006 #13 Jun 02 2017 00:32:41 %S A165006 1,0,0,1,1,1,2,1,3,2,5,2,6,3,7,4,10,5,12,6,13,7,16,8,17,9,19,10,22,11, %T A165006 23,14,26,15,30,16,33,18,34,19,37,20,39,23,42,24,47,25,48,26,50,28,55, %U A165006 29,56,32,59,33,63,34,64,37,65,40,72,41,78,44,79,46,82,49,83,51,87,52 %N A165006 Number of cycles of n-digit numbers (including fixed points) under the base-3 Kaprekar map A164993. %H A165006 Joseph Myers, <a href="/A165006/b165006.txt">Table of n, a(n) for n=1..200</a> %H A165006 H. Hanslik, E. Hetmaniok, I. Sobstyl, et al., <a href="http://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-aeb2e2a6-99ca-4268-8f6b-a947b9c04da9">Orbits of the Kaprekar's transformations-some introductory facts</a>, Zeszyty Naukowe Politechniki Śląskiej, Seria: Matematyka Stosowana z. 5, Nr kol. 1945; 2015. %H A165006 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165006 Cf. A164993, A164998, A165007, A008615. %Y A165006 In other bases: A004526 (base 2, adjusted to start 1, 0, 0, 1, 1, ...), A165025 (base 4), A165045 (base 5), A165064 (base 6), A165084 (base 7), A165103 (base 8), A165123 (base 9), A164731 (base 10). %K A165006 base,nonn %O A165006 1,7 %A A165006 _Joseph Myers_, Sep 04 2009