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 A026169 #4 Mar 30 2012 18:56:05 %S A026169 1,2,4,8,10,16,20,22,26,28,34,40,44,46,52,56,58,62,64,70,74,76,80,82, %T A026169 88,94,98,100,106,112,116,118,124,128,130,134,136,142,148,152,154,160, %U A026169 164,166,170,172,178,182,184,188,190,196,202,206 %N A026169 a(n) = s(k), where k is the n-th number k such that s(j)<s(k) for all j<k, where s = A026166. %K A026169 nonn %O A026169 1,2 %A A026169 _Clark Kimberling_