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 A165087 #6 Jun 02 2025 02:00:57 %S A165087 0,51,344,2402,16808,117650,823544,5764802,40353608,40353623,40354466, %T A165087 282475250,1977326744,1977326763,13841287202,13841287211,13841290483, %U A165087 96889010408,96889010409,678223072850,678223072851,678223072995 %N A165087 a(n) = smallest number that leads to a new cycle under the base-7 Kaprekar map of A165071. %C A165087 Initial terms in base 7: 0, 102, 1001, 10001, 100001, 1000001, 10000001, 100000001, 1000000001, 1000000022. %H A165087 Joseph Myers, <a href="/A165087/b165087.txt">Table of n, a(n) for n=1..13070</a> %H A165087 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165087 Cf. A165071, A165076, A165088, A165089. %Y A165087 In other bases: A164887 (base 2), A165009 (base 3), A165029 (base 4), A165048 (base 5), A165068 (base 6), A165107 (base 8), A165127 (base 9), A151964 (base 10). %K A165087 base,nonn %O A165087 1,2 %A A165087 _Joseph Myers_, Sep 04 2009