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 A165091 #6 Jun 02 2025 02:01:24 %S A165091 0,0,0,0,0,0,0,0,1,0,1,2,3,4,5,6,2,1,0,1,2,3,4,5,3,2,1,0,1,2,3,4,4,3, %T A165091 2,1,0,1,2,3,5,4,3,2,1,0,1,2,6,5,4,3,2,1,0,1,7,6,5,4,3,2,1,0,9,9,18, %U A165091 27,36,45,54,63,9,0,9,18,27,36,45,54,18,9,9,18,27,36,45,54,27,18,18,18,27,36 %N A165091 A165090(n)/7. %H A165091 Joseph Myers, <a href="/A165091/b165091.txt">Table of n, a(n) for n=0..4096</a> %H A165091 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A165091 Cf. A165090. %Y A165091 In other bases: A164884 (base 2), A164994 (base 3), A165013 (base 4), A165033 (base 5), A165052 (base 6), A165072 (base 7), A165111 (base 9), A151950 (base 10). %K A165091 base,nonn %O A165091 0,12 %A A165091 _Joseph Myers_, Sep 04 2009