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 A114631 #6 Feb 16 2025 08:32:59 %S A114631 1,1,0,24,384,702720,6231859200,1364560466411520 %N A114631 Number of even fixed diagonal Latin squares. %H A114631 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Alon-TarsiConjecture.html">Alon-Tarsi Paradox</a> %Y A114631 Cf. A000479, A114632. %K A114631 nonn,hard %O A114631 1,4 %A A114631 _Eric W. Weisstein_, Dec 18 2005