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 A055296 #11 Mar 07 2022 10:22:44 %S A055296 1,4,20,83,318,1095,3495,10292,28389,73586,180663,421949,942537, %T A055296 2021060,4176507,8342823,16157071,30410396,55755744,99773709, %U A055296 174579270,299163528,502804996,829905792,1346834873,2151396469 %N A055296 Number of trees with n nodes and 9 leaves. %H A055296 Georg Fischer, <a href="/A055296/b055296.txt">Table of n, a(n) for n = 10..250</a> %H A055296 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %Y A055296 Column 9 of A055290. %K A055296 nonn %O A055296 10,2 %A A055296 _Christian G. Bower_, May 09 2000