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 A165007 #6 Jun 02 2025 01:55:13 %S A165007 1,0,0,2,1,3,3,1,6,5,10,3,15,4,21,7,28,12,36,11,45,13,55,18,66,19,78, %T A165007 25,91,28,105,35,120,41,136,43,153,47,171,56,190,58,210,68,231,73,253, %U A165007 84,276,85,300,97,325,103,351,116,378,119,406,133,435,140,465,155,496,162 %N A165007 Number of n-digit numbers in a cycle (including fixed points) under the base-3 Kaprekar map A164993. %H A165007 Joseph Myers, <a href="/A165007/b165007.txt">Table of n, a(n) for n=1..200</a> %H A165007 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165007 Cf. A164993, A164998, A165006, A008615. %Y A165007 In other bases: A004526 (base 2, adjusted to start 1, 0, 0, 1, 1, ...), A165026 (base 4), A165046 (base 5), A165065 (base 6), A165085 (base 7), A165104 (base 8), A165124 (base 9), A164732 (base 10). %K A165007 base,nonn %O A165007 1,4 %A A165007 _Joseph Myers_, Sep 04 2009