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 A196417 #7 Oct 13 2020 03:27:17 %S A196417 1,2,5,14,42,131,417,1341,4334,14042,45562,148029,481804,1572625, %T A196417 5156025,17018505,56717910,191540940,658084182,2309516616 %N A196417 Erroneous version of A080937. %H A196417 Aleksandar Ilic and Andreja Ilic, <a href="https://doi.org/10.2298/FIL1103191I">On the number of restricted Dyck paths</a>, Filomat 25:3 (2011), 191-201. %K A196417 dead %O A196417 1,2