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 A055353 #14 Mar 14 2022 07:18:43
%S A055353 840,98784,6618528,339111360,14931378000,600119150400,22811289621120,
%T A055353 838683494288640,30275663821603200,1084273458428160000,
%U A055353 38808699592126464000,1395650171787308236800,50626461643690886553600
%N A055353 Number of labeled mobiles (circular rooted trees) with n nodes and 6 leaves.
%H A055353 Georg Fischer, <a href="/A055353/b055353.txt">Table of n, a(n) for n = 7..250</a>
%H A055353 <a href="/index/Mo#mobiles">Index entries for sequences related to mobiles</a>
%t A055353 m = 20; L[x_] = Log[1 - x] + O[x]^m // Normal; A[_] = 0;
%t A055353 Do[A[x_] = x y - x L[A[x]] + O[x]^k // Normal // Expand, {k, m}];
%t A055353 Drop[(SeriesCoefficient[#, {y, 0, 6}] & /@ CoefficientList[A[x], x]) * Range[0, m - 1]!, 7] (* _Jean-François Alcover_, Nov 01 2019 *)
%Y A055353 Column 6 of A055349.
%K A055353 nonn
%O A055353 7,1
%A A055353 _Christian G. Bower_, May 15 2000