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 A165016 #6 Jun 02 2025 01:55:31 %S A165016 0,30,201,2550,3369,3873,14565,54441,62625,64641,171990,234405,254865, %T A165016 873129,954261,1004193,1036929,1044993,3755685,4083345,4165185, %U A165016 11140950,13978281,15285909,16075425,16399953,16599681,16730625,16762881 %N A165016 List of fixed points of the base-4 Kaprekar map A165012. %C A165016 Initial terms in base 4: 0, 132, 3021, 213312, 310221, 330201, 3203211, 31102221, 33102201, 33302001. %H A165016 Joseph Myers, <a href="/A165016/b165016.txt">Table of n, a(n) for n=1..7138</a> %H A165016 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165016 Cf. A165012, A165017, A165019, A165027. %Y A165016 In other bases: A163205 (base 2), A164997 (base 3), A165036 (base 5), A165055 (base 6), A165075 (base 7), A165094 (base 8), A165114 (base 9), A099009 (base 10). %K A165016 base,nonn %O A165016 1,2 %A A165016 _Joseph Myers_, Sep 04 2009