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 A133001 #10 Jan 24 2024 10:22:51 %S A133001 1,12,56,64,31360,50176,33116160,264929280 %N A133001 Denominators of Blandin-Diaz compositional Bernoulli numbers (B^Z^(3))_1,n. %H A133001 Hector Blandin and Rafael Diaz, <a href="https://arxiv.org/abs/0708.0809">Compositional Bernoulli numbers</a>, arXiv:0708.0809 [math.CO], 2007-2008, p. 9, 3rd table. %e A133001 60, -15/12, 9/56, 3/64, 401/31360, 127/50176, -9089/33116160, -192233/264929280. %Y A133001 Numerators are A133000. %Y A133001 Cf. A132092-A132099. %K A133001 frac,more,nonn %O A133001 0,2 %A A133001 _Jonathan Vos Post_, Aug 09 2007