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 A006398 M1163 #18 Jan 16 2025 14:17:50 %S A006398 1,0,1,2,4,8,29,92,403,1846,9239,48028,259567 %N A006398 Number of sensed planar maps with n edges and without loops or isthmuses. %D A006398 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006398 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 A006398 Cf. A006384, A006390, A006399 (unsensed), A099553 (rooted). %K A006398 nonn,more %O A006398 0,4 %A A006398 _N. J. A. Sloane_ %E A006398 a(9)-a(12) from _Sean A. Irvine_, Mar 29 2017 %E A006398 a(0)-a(1) prepended by _Andrew Howroyd_, Jan 16 2025