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 A006396 M1238 #23 Jan 16 2025 14:17:43 %S A006396 1,0,1,2,4,10,36,132,616,3060,16207,88990,503816 %N A006396 Number of sensed planar maps with n edges and without faces or vertices of degree 1. %D A006396 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006396 Timothy R. Walsh, <a href="http://dx.doi.org/10.1137/0604018">Generating nonisomorphic maps without storing them</a>, SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178. %Y A006396 Cf. A006384, A006388, A006397 (unsensed), A379435 (rooted). %K A006396 nonn,more %O A006396 0,4 %A A006396 _N. J. A. Sloane_ %E A006396 a(9)-a(12) from _Sean A. Irvine_, Mar 28 2017 %E A006396 a(0)-a(2) prepended by _Andrew Howroyd_, Jan 16 2025