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 A058802 #14 Aug 06 2024 06:54:46 %S A058802 1,1,3,8,26,96,414,2040,11432,72022,503973,3875329,32429747,292872455, %T A058802 2834089224,29209213572,318979706486 %N A058802 Vertically decomposable lattices on n unlabeled nodes. %H A058802 J. Heitzig and J. Reinhold, <a href="https://citeseerx.ist.psu.edu/pdf/4186ccb354bdd7f32931eabef3c85f8459f5b292">Counting finite lattices</a>, preprint no. 298, Institut für Mathematik, Universität Hanover, Germany, 1999. %H A058802 J. Heitzig and J. Reinhold, <a href="https://doi.org/10.1007/PL00013837">Counting finite lattices</a>, Algebra Universalis, 48 (2002), 43-53. %F A058802 a(n) = A006966(n) - A058800(n). %Y A058802 Cf. A006966, A058800. %K A058802 nonn,hard %O A058802 3,3 %A A058802 _Christian G. Bower_, Dec 28 2000