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 A038054 #10 Dec 19 2015 09:55:27 %S A038054 1,2,4,12,80,800,10752,181888,3714048,88915968,2442936320,75776712704, %T A038054 2619618852864,99879826948096,4163954627051520,188441538173337600, %U A038054 9200521811924615168,482067547423055544320,26980938272912248406016 %N A038054 Number of labeled trees with 2-colored leaves. %H A038054 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %F A038054 (A038049 + A038053)/n. %Y A038054 Cf. A036251. %K A038054 nonn %O A038054 0,2 %A A038054 _Christian G. Bower_, Jan 04 1999