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 A006405 M1365 #18 Jan 16 2025 16:26:55 %S A006405 1,1,2,5,9,24,70,222,785,3055 %N A006405 Number of unsensed 2-connected maps with n edges and without faces of degree 2. %D A006405 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006405 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 A006405 Cf. A006385, A006403, A006405 (sensed). %K A006405 nonn,more %O A006405 3,3 %A A006405 _N. J. A. Sloane_ %E A006405 a(11) and a(12) from _Sean A. Irvine_, Apr 02 2017