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 A055294 #11 Mar 07 2022 10:22:35 %S A055294 1,3,12,39,119,325,833,1972,4411,9318,18789,36248,67361,120868,210354, %T A055294 355873,587070,946127,1493015,2310430,3512236,5251416,7732998, %U A055294 11226380,16084556,22762426,31844621,44072033,60380915,81940412 %N A055294 Number of trees with n nodes and 7 leaves. %H A055294 Georg Fischer, <a href="/A055294/b055294.txt">Table of n, a(n) for n = 8..250</a> %H A055294 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %Y A055294 Column 7 of A055290. %K A055294 nonn %O A055294 8,2 %A A055294 _Christian G. Bower_, May 09 2000