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 A211602 #17 Nov 05 2020 05:30:36 %S A211602 0,1,3,7,20,70,287,1356,7248 %N A211602 Number of binary increasing trees with n nodes and "min-path" of length 3. %H A211602 Filippo Disanto, <a href="http://arxiv.org/abs/1202.1139">André permutations of the second kind associated to strictly binary increasing trees and left to right minima in their sub-permutations</a>, arXiv preprint arXiv:1202.1139 [math.CO], 2012-2014. %Y A211602 A diagonal of A186366. %K A211602 nonn,more %O A211602 2,3 %A A211602 _N. J. A. Sloane_, May 11 2012