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 A323281 #5 Jan 11 2019 19:30:27 %S A323281 610,713230,730427830,714985017230,684597649115160,647152118916722050, %T A323281 606713944500089445300,565552162701658630787310, %U A323281 524985730432063320579176680,485790080943651818443229561080 %N A323281 Number of 5-regular maps on the Klein bottle with n vertices and 2n edges. %H A323281 Evgeniy Krasko, Alexander Omelchenko, <a href="https://doi.org/10.1016/j.disc.2018.07.013">Enumeration of r-regular maps on the torus. Part I: Rooted maps on the torus, the projective plane and the Klein bottle. Sensed maps on the torus</a>, Discrete Mathematics (2019) Vol. 342, Issue 2, 584-599. Also <a href="https://arxiv.org/abs/1709.03225">arXiv:1709.03225 [math.CO]</a>. See Table 3. %K A323281 nonn %O A323281 1,1 %A A323281 _N. J. A. Sloane_, Jan 11 2019