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 A055343 #7 Mar 30 2012 17:37:11 %S A055343 1,5,25,96,300,811,1951,4293,8782,16917,30973,54302,91696,149856, %T A055343 237936,368234,556973,825275,1200241,1716266,2416494,3354545,4596419, %U A055343 6222721,8331088,11039003,14486835,18841334,24299386,31092284 %N A055343 Number of mobiles (circular rooted trees) with n nodes and 5 leaves. %H A055343 <a href="/index/Mo#mobiles">Index entries for sequences related to mobiles</a> %Y A055343 Column 5 of A055340. %K A055343 nonn %O A055343 6,2 %A A055343 _Christian G. Bower_, May 14 2000