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 A068941 #37 Feb 16 2025 08:32:45 %S A068941 1,1,6,16,38,80,145 %N A068941 Maximum number of chess queens that can be placed on a 4-dimensional chessboard of order n so that no two attack each other. %H A068941 Alexis Langlois-Rémillard, Christoph Müßig, and Érika Róldan, <a href="https://arxiv.org/abs/2211.05651">Complexity of Chess Domination Problems</a>, arXiv:2211.05651 [math.CO], 2022-2023. %H A068941 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IndependenceNumber.html">Independence Number</a>. %H A068941 Al Zimmermann, <a href="http://recmath.com/contest/AttackingQueens/Description.html">Attacking Queens Programming Contest</a> %H A068941 Al Zimmermann, <a href="http://recmath.com/contest/AttackingQueens/FinalReport.html">Attacking Queens Programming Contest Results</a> %H A068941 Al Zimmermann, <a href="http://groups.yahoo.com/group/AttackingQueens/database">Attacking Queens Programming Contest Database</a> [broken link?] %Y A068941 Cf. A068940, A375104. %K A068941 nonn,more %O A068941 1,3 %A A068941 _Al Zimmermann_, Mar 08 2002 %E A068941 a(5) from Alexis Langlois-Rémillard, Christoph Müßig and Érika Roldán added by _Christoph Muessig_, Nov 11 2022 %E A068941 a(6)-a(7) from Alexis Langlois-Rémillard, Christoph Müßig and Érika Roldán added by _Christoph Muessig_, Apr 02 2023