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 A365449 #25 Oct 03 2023 17:12:34 %S A365449 1,1,-1,-3,11,45,-301,-1475,14755,85629 %N A365449 Cn(-1) where Cn is the n-th Caylerian polynomial (see A366173). %H A365449 Giulio Cerbai and Anders Claesson, <a href="https://arxiv.org/abs/2310.01270">Caylerian polynomials</a>, arXiv:2310.01270 [math.CO], 2023. See p. 29. %Y A365449 Cf. A366173. %K A365449 sign,more %O A365449 0,4 %A A365449 _Michel Marcus_, Oct 03 2023