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 A292468 #31 Nov 02 2021 02:31:10 %S A292468 1,4,20,133,1013,9209,89889,929373,9880120,107087360,1174950951, %T A292468 13008800489,145024885270,1625819872988,18311555574347, %U A292468 207068032188985,2349706730746994,26745505016101977,305267158873891108,3492857897924201864 %N A292468 Number of 4-regular maps with n vertices on the torus, up to orientation-preserving and orientation-reversing isomorphisms. %H A292468 E. Krasko and A. Omelchenko, <a href="https://arxiv.org/abs/1709.03230">Enumeration of r-regular Maps on the Torus. Part II: Enumeration of Unsensed Maps</a>, arXiv preprint arXiv:1709.03230 [math.CO], 2017. See Table 1, p. 20. %H A292468 E. Krasko and A. Omelchenko, <a href="https://doi.org/10.1016/j.disc.2018.09.004">Enumeration of r-regular maps on the torus. Part II: Unsensed maps</a>, Discrete Mathematics, Volume 342, Issue 2, February 2019, pp. 600-614. %Y A292468 Cf. A292971 (enumerates up to orientation-preserving isomorphisms only), A292405, A292408. %K A292468 nonn %O A292468 1,2 %A A292468 _Evgeniy Krasko_, Sep 17 2017