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 A165124 #6 Jun 01 2017 15:10:02 %S A165124 1,2,2,6,6,14,2,5,13,10,7,10,11,13,14,3,11,17,11,23,23,17,28,10,58,17, %T A165124 69,40,71,38,83,43,125,26,139,17,154,23,167,42,202,71,204,34,209,65, %U A165124 227,45,212,62,223,86,243,77,317,90,310,125,324,83,363,86,346,159,492,124 %N A165124 Number of n-digit numbers in a cycle (including fixed points) under the base-9 Kaprekar map A165110. %H A165124 Joseph Myers, <a href="/A165124/b165124.txt">Table of n, a(n) for n=1..70</a> %H A165124 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165124 Cf. A165110, A165115, A165123, A165125. %Y A165124 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), A164732 (base 10). %K A165124 base,nonn %O A165124 1,2 %A A165124 _Joseph Myers_, Sep 04 2009