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 A348803 #7 Jan 17 2025 12:29:47 %S A348803 0,0,2,16,137,1254,12597,133518,1464725,16373700,185086459,2106417804, %T A348803 24081813881,276231542440,3176840637522 %N A348803 a(n) = number of non-orientable genus 2 maps with n edges. %H A348803 Evgeniy Krasko and Alexander Omelchenko, <a href="https://arxiv.org/abs/1712.10139">Enumeration of Unsensed Orientable Maps on Surfaces of a Given Genus</a>, arXiv:1712.10139 [math.CO], 2017, see Appendix Table 5. %Y A348803 Column k=2 of A380235. %Y A348803 Cf. A348802, A348804, A348805, A348806, A348807, A348808, A348809, A348810, A348811. %K A348803 nonn,more %O A348803 0,3 %A A348803 _Michael De Vlieger_, Nov 01 2021