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 A166054 #2 Mar 31 2012 13:21:20 %S A166054 4,8,14,15,25,32,62,69,74,92,98,104,123,177,188,224,231,235,242,272, %T A166054 284,285,301,339,398,434,435,447,452,482,494,501,554,602,605,608,609, %U A166054 662,663,675,692,711,717,728,734,795,811,812,825,854,879,902,914,919 %N A166054 Third row of A166091. Positions of 5's in A166086. %Y A166054 See A166055. %K A166054 nonn %O A166054 1,1 %A A166054 _Antti Karttunen_, Oct 08 2009