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 A112950 #2 Mar 30 2012 18:53:07 %S A112950 39,80600,513654400,4742588317460,53786496621600480, %T A112950 696401295433093120200,9891028759926839453714800, %U A112950 150420303869075439022288355100,2410984386008752279281147366400400 %N A112950 Number of unrooted regular planar maps of valency 7 with 2n vertices (considered up to orientation-preserving homeomorphisms). %C A112950 No closed formula is known. %H A112950 Z. C. Gao, V. A. Liskovets and N. C. Wormald, <a href="http://mathstat.carleton.ca/~zgao/PAPER/poles.pdf">Enumeration of unrooted odd-valent regular planar maps</a>, Preprint, 2005. %Y A112950 Cf. A112949. %K A112950 nonn %O A112950 1,1 %A A112950 _Valery A. Liskovets_, Oct 10 2005