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 A165026 #6 Jun 02 2025 01:56:19 %S A165026 1,0,1,3,2,3,1,6,3,5,6,8,5,12,8,12,12,16,12,21,16,22,21,27,22,33,27, %T A165026 35,33,41,35,48,41,51,48,58,51,66,58,70,66,78,70,87,78,92,87,101,92, %U A165026 111,101,117,111,127,117,138,127,145,138,156,145,168,156,176,168,188,176 %N A165026 Number of n-digit numbers in a cycle (including fixed points) under the base-4 Kaprekar map A165012. %H A165026 Joseph Myers, <a href="/A165026/b165026.txt">Table of n, a(n) for n=1..200</a> %H A165026 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165026 Cf. A165012, A165017, A165025, A165027. %Y A165026 In other bases: A004526 (base 2, adjusted to start 1, 0, 0, 1, 1, ...), A165007 (base 3), A165046 (base 5), A165065 (base 6), A165085 (base 7), A165104 (base 8), A165124 (base 9), A164732 (base 10). %K A165026 base,nonn %O A165026 1,4 %A A165026 _Joseph Myers_, Sep 04 2009