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 A055287 #11 Mar 05 2022 04:19:41 %S A055287 1,12,114,864,5541,30846,152596,681428,2783239,10504028,36943275, %T A055287 121939535,380006322,1123838933,3168283157,8547632165,22144509397, %U A055287 55260123176,133188829780,310810391963,703802522743,1549519595711 %N A055287 Number of rooted trees with n nodes and 12 leaves. %H A055287 Georg Fischer, <a href="/A055287/b055287.txt">Table of n, a(n) for n = 13..278</a> %H A055287 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a> %Y A055287 Column 12 of A055277. %K A055287 nonn %O A055287 13,2 %A A055287 _Christian G. Bower_, May 09 2000