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 A164732 #13 Jun 02 2017 00:31:57 %S A164732 1,0,1,1,10,9,8,12,16,22,14,42,18,73,29,125,34,199,38,308,49,462,71, %T A164732 665,105,920,161,1243,249,1658,379,2170,555,2806,780,3587,1075,4539, %U A164732 1449,5689,1922,7059,2516,8677,3252,10566,4156,12774,5255,15337,6578,18300 %N A164732 Number of n-digit numbers in a cycle (including fixed points) under the Kaprekar map A151949. %H A164732 Joseph Myers, <a href="/A164732/b164732.txt">Table of n, a(n) for n=1..70</a> %H A164732 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 A164732 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A164732 Cf. A151949, A164716, A164731, A164733, A164734, A164735, A164736. %Y A164732 In other bases: A004526 (base 2, adjusted to start 1, 0, 0, 1, 1, ...), A165007 (base 3), A165026 (base 4), A165046 (base 5), A165065 (base 6), A165085 (base 7), A165104 (base 8), A165124 (base 9). [_Joseph Myers_, Sep 05 2009] %K A164732 base,nonn %O A164732 1,5 %A A164732 _Joseph Myers_, Aug 23 2009