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 A098852 #12 Mar 04 2020 05:54:16 %S A098852 0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,2,6,40,307 %N A098852 Number of triangle-free self-dual configurations of type (n_3). %H A098852 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. %Y A098852 Cf. A001403, A100001, A023994. %K A098852 nonn,hard,more %O A098852 1,18 %A A098852 _N. J. A. Sloane_, Nov 05 2004