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 A113204 #26 Oct 11 2019 03:48:08 %S A113204 0,0,0,0,0,1,0,1,1,4,3,15,25,92,234,803,2469,8512,28290,98148,338673, %T A113204 1188338,4180854,14840031,52904562,189724510,683384218,2472961423, %U A113204 8984888982,32772085447,119963084542,440623586740,1623555117611 %N A113204 Same as A007022, but with orientation-reversing isomorphisms forbidden. %H A113204 G. Brinkmann, S. Greenberg, C. Greenhill, B. D. McKay, R. Thomas, and P. Wollan, <a href="http://people.math.gatech.edu/~thomas/PAP/quad.pdf">Generation of simple quadrangulations of the sphere</a>, Discr. Math., 305 (2005), 33-54. doi:<a href="http://dx.doi.org/10.1016/j.disc.2005.10.005">10.1016/j.disc.2005.10.005</a> %H A113204 Gunnar Brinkmann and Brendan McKay, <a href="http://users.cecs.anu.edu.au/~bdm/plantri/">plantri and fullgen</a> programs for generation of certain types of planar graph. %H A113204 Gunnar Brinkmann and Brendan McKay, <a href="/A000103/a000103_1.pdf">plantri and fullgen</a> programs for generation of certain types of planar graph [Cached copy, pdf file only, no active links, with permission] %H A113204 CombOS - Combinatorial Object Server, <a href="http://combos.org/plantri">generate planar graphs</a> %Y A113204 Cf. A113201, A078666, A007022, A002880, A113202, A113205. %K A113204 nonn %O A113204 1,10 %A A113204 _N. J. A. Sloane_, Jan 07 2006 %E A113204 a(29) corrected by _Brendan McKay_, Jun 22 2006 %E A113204 Leading zeros prepended by _Max Alekseyev_, Sep 13 2016 %E A113204 Offset corrected by _Andrey Zabolotskiy_, Feb 09 2018