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 A055297 #11 Mar 07 2022 10:22:48 %S A055297 1,5,25,116,482,1834,6399,20688,62355,176542,472051,1198756,2904166, %T A055297 6740600,15042512,32382969,67441667,136233495,267534126,511819591, %U A055297 955658500,1744487967,3117961283,5463991463,9400016470,15893600813 %N A055297 Number of trees with n nodes and 10 leaves. %H A055297 Georg Fischer, <a href="/A055297/b055297.txt">Table of n, a(n) for n = 11..250</a> %H A055297 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %Y A055297 Column 10 of A055290. %K A055297 nonn %O A055297 11,2 %A A055297 _Christian G. Bower_, May 09 2000