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 A169863 #7 Aug 31 2021 05:37:25 %S A169863 3,6,8,10,13,15,17,19,22,24,26,28,30,32,35,37,39,41,43,45,47,49,52,54, %T A169863 56,58,60,62,64,66,68,70,73,75,77,79,81,83,85,87,89,91,93,96,98,100, %U A169863 102,104,106,108,110,112,114,116,118,120,123 %N A169863 Complement of A093848. %H A169863 T. D. Noe, <a href="/A169863/b169863.txt">Table of n, a(n) for n=1..1000</a> %Y A169863 Cf. A093848. %K A169863 nonn %O A169863 1,1 %A A169863 _N. J. A. Sloane_, Jun 27 2010, following a suggestion from _Jeremy Gardiner_