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 A058801 #13 Mar 17 2020 19:31:40
%S A058801 1,2,6,25,116,625,3757,25140,184511,1473861,12711339,117598686,
%T A058801 1160399052,12152333659,134487937252,1566878426731,19154490559458
%N A058801 Number of connected vertically indecomposable partial lattices on n unlabeled nodes.
%C A058801 A partial lattice is a poset where every pair of points has a unique least upper (greatest lower) bound or has no upper (lower) bound.
%H A058801 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%F A058801 Inverse EULER transform of A058800(n+2).
%t A058801 A058800 = Cases[Import["https://oeis.org/A058800/b058800.txt", "Table"], {_, _}][[All, 2]];
%t A058801 (* EulerInvTransform is defined in A022562 *)
%t A058801 EulerInvTransform[Drop[A058800, 3]] // Rest (* _Jean-François Alcover_, May 10 2019, updated Mar 17 2020 *)
%Y A058801 Cf. A006966.
%K A058801 nonn,hard
%O A058801 2,2
%A A058801 _Christian G. Bower_, Dec 28 2000
%E A058801 a(17)-a(18) (computed from A058800) from _Jean-François Alcover_, May 10 2019