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 A356197 #8 Sep 27 2022 19:35:53 %S A356197 1,1,4,28,260,2872,35620,479508 %N A356197 Number of Baxter 3-permutations of length n. %H A356197 Nicolas Bonichon and Pierre-Jean Morel, <a href="https://arxiv.org/abs/2202.12677">Baxter d-permutations and other pattern avoiding classes</a>, arXiv:2202.12677 [math.CO], 2022. %Y A356197 Cf. A001181. %K A356197 nonn,more %O A356197 0,3 %A A356197 _Nicolas Bonichon_, Jul 29 2022