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 A098851 #25 Sep 07 2021 02:46:08 %S A098851 0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,4,14,162,4713,157211 %N A098851 Number of triangle-free configurations of type (n_3). %H A098851 A. Alazemi and A. Betten, <a href="https://doi.org/10.1155/2010/767361">Classification of Triangle-Free 22_3 Configurations</a>, International Journal of Combinatorics, Volume 2010, Article ID 767361. %H A098851 A. Betten, G. Brinkmann and T. Pisanski, <a href="https://doi.org/10.1016/S0166-218X(99)00143-2">Counting symmetric configurations v_3</a>, Discrete Appl. Math., 99 (2000), 331-338. %H A098851 M. Boben et al., <a href="https://doi.org/10.1007/s00454-005-1224-9">Small triangle-free configurations of points and lines</a>, Discrete Comput. Geom., 35 (2006), 405-427. %Y A098851 Cf. A001403. %K A098851 nonn,more,hard %O A098851 1,18 %A A098851 _N. J. A. Sloane_ %E A098851 a(22) from _Abdullah Alazemi_, Sep 05 2021