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 A372892 #22 Jun 15 2025 16:55:34 %S A372892 1,1,2,6,25,179,2014,31178,580555,12046072,267836680,6258809085, %T A372892 151983244000,3807081193879 %N A372892 Total number of unlabeled simple maps on the sphere with n vertices. %C A372892 Computed by Brendan McKay. %C A372892 a(n) is the same as the total number of distinct spherical drawings of connected graphs with n vertices. %H A372892 Gunnar Brinkmann and Brendan McKay, <a href="https://users.cecs.anu.edu.au/~bdm/papers/plantri-full.pdf">Fast generation of planar graphs (expanded edition)</a>, Tables 19-22. %Y A372892 Row sums of A384963, column sums of A384850. %Y A372892 Cf. A372853 (uniquely embeddable connected graphs). %Y A372892 Cf. A372854 (largest numbers of planar embeddings for connected graphs). %Y A372892 Cf. A006395 (with n edges), A384965 (sensed version). %K A372892 nonn,more %O A372892 1,3 %A A372892 _Eric W. Weisstein_, May 19 2024 %E A372892 a(14) added by _Andrew Howroyd_, Jun 13 2025