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 A214805 #7 Jan 08 2024 09:39:45 %S A214805 0,160680,6652366,146387872,2298445830,28995928200 %N A214805 Number of rooted maps with n vertices and 3 faces on a non-orientable surface of type 2. %H A214805 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 A214805 A diagonal of A214806. %K A214805 nonn,more %O A214805 0,2 %A A214805 _N. J. A. Sloane_, Jul 28 2012