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 A165039 #6 Jun 02 2025 01:57:26 %S A165039 48,72,1992,2232,2616,2856,7488,9992,10712,11432,13736,53712,57432, %T A165039 66216,73056,249992,272312,284832,287432,347336,349936,6249992, %U A165039 8687336,8785936,9236656,45781056,45874056,46264656,170312312,178124832 %N A165039 Consider the base-5 Kaprekar map n->K(n) defined in A165032. Sequence gives numbers belonging to cycles of length greater than 1. %C A165039 Initial terms in base 5: 143, 242, 30432, 32412, 40431, 42411, 214423, 304432, 320322, 331212. %H A165039 Joseph Myers, <a href="/A165039/b165039.txt">Table of n, a(n) for n=1..36656</a> %H A165039 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165039 Cf. A165032, A165040, A165036, A165037, A165041, A165043, A165049. %Y A165039 In other bases: Empty (base 2), A165000 (base 3), A165019 (base 4), A165058 (base 6), A165078 (base 7), A165097 (base 8), A165117 (base 9), A099010 (base 10). %K A165039 base,nonn %O A165039 1,1 %A A165039 _Joseph Myers_, Sep 04 2009