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 A164994 #6 Jun 02 2025 01:54:20 %S A164994 0,0,0,1,0,1,2,1,0,4,4,8,4,0,4,8,4,4,8,8,8,8,4,4,8,4,0,13,16,29,16,13, %T A164994 26,29,26,29,16,13,26,13,0,13,26,13,16,29,26,29,26,13,16,29,16,13,26, %U A164994 29,32,29,26,29,32,29,26,29,26,29,26,13,16,29,16,13,32,29,26,29,16,13,26 %N A164994 A164993(n)/2. %H A164994 Joseph Myers, <a href="/A164994/b164994.txt">Table of n, a(n) for n=0..2187</a> %H A164994 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a> %Y A164994 Cf. A164993. %Y A164994 In other bases: A164884 (base 2), A165013 (base 4), A165033 (base 5), A165052 (base 6), A165072 (base 7), A165091 (base 8), A165111 (base 9), A151950 (base 10). %K A164994 base,nonn %O A164994 0,7 %A A164994 _Joseph Myers_, Sep 04 2009