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 A380620 #4 Jan 30 2025 15:28:33 %S A380620 1,2,8,33,198,1571,16431,213831,3288821 %N A380620 Number of unsensed combinatorial maps with n edges and 2 vertices. %C A380620 By duality, also the number of unsensed combinatorial maps with n edges and 2 faces. %Y A380620 Column 2 of A380616. %Y A380620 Cf. A380239 (planar), A380618 (sensed), A380621 (3 vertices). %K A380620 nonn,more %O A380620 1,2 %A A380620 _Andrew Howroyd_, Jan 28 2025