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 A065594 #11 Jul 19 2025 10:11:55 %S A065594 1,3,30,43680,11030100480,2775108817859051520, %T A065594 1283862525618838460637401579520 %N A065594 a(n) = A036981(n)/(2n)!. %H A065594 <a href="/index/To#tournament">Index entries for sequences related to tournaments</a>. %Y A065594 Cf. A036981. %K A065594 nonn,hard,more %O A065594 0,2 %A A065594 Andres Cardemil (andrescarde(AT)yahoo.com), Nov 28 2001 %E A065594 a(5)-a(6) added using the data at A036981 by _Amiram Eldar_, Jul 19 2025