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 A171926 #3 Mar 30 2012 17:28:13 %S A171926 1,2,4,7,10,15,17,20,23,25,26,31,37,39,40,41,42,44,50,53,56,59,60,71, %T A171926 73,81,86,92,97,104,105,111,115,116,118,120,126,131,139,141,142,143, %U A171926 153,164,166,169,177,180,181,191,193,195,196,198,203,205,206,208,212,225,230,232 %N A171926 Position where A171921(n) first occurs in A171922. %H A171926 Hugo van der Sanden, <a href="/A171926/b171926.txt">Table of n, a(n) for n = 1..2347</a> %Y A171926 Cf. A171921, A171922, A171927, A171928. %K A171926 nonn %O A171926 1,2 %A A171926 _Hugo van der Sanden_, Oct 23 2010