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 A294429 #8 Nov 08 2017 02:25:43 %S A294429 1,2,4,6,12,20,36,54,108,172,324,530,984,1672,3028,5232,9388 %N A294429 Number of zero-energy ground states for one-dimensional periodic fermions with n sites. %H A294429 Noriaki Sannomiya, H. Katsura, Y. Nakayama, <a href="https://arxiv.org/abs/1612.02285">Supersymmetry breaking and Nambu-Goldstone fermions with cubic dispersion</a>, arXiv preprint arXiv:1612.02285 [cond-mat.str-el], 2016. See Table I, line 1. %Y A294429 Cf. A007040, A068911. %K A294429 nonn,more %O A294429 0,2 %A A294429 _N. J. A. Sloane_, Nov 07 2017