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 A380236 #5 Jan 17 2025 12:15:49 %S A380236 1,2,8,47,473,7190,144904,3534490,100895667,3276228298,119465644032, %T A380236 4827606232542,214282994249825,10361526316840074 %N A380236 Number of non-orientable genus n maps with n edges. %Y A380236 Main diagonal of A380235. %K A380236 nonn,more %O A380236 1,2 %A A380236 _Andrew Howroyd_, Jan 17 2025