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 A055305 #15 Sep 08 2022 08:45:01
%S A055305 5,450,18900,588000,15876000,400075200,9779616000,237105792000,
%T A055305 5779453680000,142845262560000,3599700616512000,92818726640640000,
%U A055305 2454539660052480000,66664716210892800000,1861170036255129600000
%N A055305 Number of labeled rooted trees with n nodes and 4 leaves.
%H A055305 Vincenzo Librandi, <a href="/A055305/b055305.txt">Table of n, a(n) for n = 5..200</a>
%H A055305 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>
%F A055305 a(n) = n! * (n-4)^2*(n-3)^2*(n-2)*(n-1)/1152. - _Vaclav Kotesovec_, Jul 25 2014
%t A055305 Table[n! * (n-4)^2*(n-3)^2*(n-2)*(n-1)/1152,{n,5,20}] (* _Vaclav Kotesovec_, Jul 25 2014 *)
%o A055305 (Magma) [Factorial(n)*(n-4)^2*(n-3)^2*(n-2)*(n-1)/1152 : n in [5..25]]; // _Vincenzo Librandi_, Jul 25 2014
%Y A055305 Column 4 of A055302.
%K A055305 nonn
%O A055305 5,1
%A A055305 _Christian G. Bower_, May 11 2000