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 A165073 #6 Jun 02 2025 02:00:01 %S A165073 0,1,1,1,1,1,1,2,1,2,3,4,2,4,3,2,1,2,3,4,2,4,3,2,1,2,3,4,2,4,3,2,1,2, %T A165073 3,4,2,4,3,2,1,2,3,4,2,4,3,2,1,2,2,3,1,1,2,3,2,1,2,3,1,1,2,3,2,2,3,1, %U A165073 1,2,1,3,3,3,1,1,2,1,1,1,1,1,1,2,2,1,1,1,1,1,2,3,2,2,2,2,2,2,3,3,3,1,1,2,3 %N A165073 Length of preperiodic part of trajectory of n under iteration of the base-7 Kaprekar map in A165071. %H A165073 Joseph Myers, <a href="/A165073/b165073.txt">Table of n, a(n) for n=0..2401</a> %H A165073 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165073 Cf. A165071, A165074. %Y A165073 In other bases: A164885 (base 2), A164995 (base 3), A165014 (base 4), A165034 (base 5), A165053 (base 6), A165092 (base 8), A165112 (base 9), A151962 (base 10). %K A165073 base,nonn %O A165073 0,8 %A A165073 _Joseph Myers_, Sep 04 2009