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 A006392 M3368 #19 Jan 16 2025 14:17:27 %S A006392 1,0,1,4,9,34,161,830,4779,29092,184510,1208178,8116922 %N A006392 Number of sensed planar maps with n edges and without faces of degree 1 or 2. %D A006392 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006392 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 A006392 Cf. A006384, A006388, A006393 (unsensed), A379434 (rooted). %K A006392 nonn,more %O A006392 0,4 %A A006392 _N. J. A. Sloane_ %E A006392 a(8)-a(12) from _Sean A. Irvine_, Mar 29 2017 %E A006392 a(0)-a(1) prepended by _Andrew Howroyd_, Jan 16 2025