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 A037186 #11 Jul 08 2025 22:03:44 %S A037186 0,0,0,0,2,0,1,5,3,3,6,3,9,5,13,14,12,14,16,17,13,18,34,43,55 %N A037186 Number of ways of placing 2n points on n X n grid so no 3 are in a line (solutions with symmetry about one main diagonal). %H A037186 A. Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/no3in/table.txt">Solutions of the no-three-in-line problem</a> %H A037186 A. Flammenkamp, <a href="https://doi.org/10.1016/0097-3165(92)90012-J">Progress in the no-three-in-line problem</a>, J. Combinat. Theory A 60 (1992), 305-311. %H A037186 A. Flammenkamp, <a href="https://doi.org/10.1006/jcta.1997.2829">Progress in the no-three-in-line problem. II</a>, J. Combin. Theory Ser. A 81 (1998), no. 1, 108-113. %Y A037186 Cf. A000769. %K A037186 nonn,more %O A037186 1,5 %A A037186 _N. J. A. Sloane_