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 A214804 #7 Jan 08 2024 09:39:50 %S A214804 0,11660,375552,6652366,86303920,918342738 %N A214804 Number of rooted maps with n vertices and 2 faces on a non-orientable surface of type 2. %H A214804 Didier Arquès and Alain Giorgetti, <a href="https://doi.org/10.1016/S0304-3975(98)00230-8">Counting rooted maps on a surface</a>, Theoret. Comput. Sci. 234 (2000), no. 1-2, 255--272. MR1745078 (2001f:05078). %Y A214804 A diagonal of A214806. %K A214804 nonn,more %O A214804 0,2 %A A214804 _N. J. A. Sloane_, Jul 28 2012