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 A160368 #8 Mar 31 2012 20:25:00 %S A160368 1,0,0,48,1440,0,19353600,4180377600,25070769561600, %T A160368 3200285563453440000 %N A160368 Number of self-orthogonal Latin squares of order n. %C A160368 A self-orthogonal Latin square is a Latin square orthogonal to its transpose and a SOLS L is idempotent if L(i,i)=i. The number of distinct SOLS of order n may be determined by multiplying the number of idempotent SOLS of order n by n!. %D A160368 G. P. Graham and C.E. Roberts, 2006. Enumeration and isomorphic classification of self-orthogonal Latin squares, Journal of Combinatorial Mathematics and Combinatorial Computing, 59, pp. 101-118. %H A160368 A. P. Burger, M. P. Kidd and J. H. van Vuuren, 2010. <a href="http://www.vuuren.co.za/papers/SOLSEnum10.pdf">Enumerasie van self-ortogonale Latynse vierkante van orde 10</a>, LitNet Akademies (Natuurwetenskappe), 7(3), pp 1-22. %H A160368 A. P. Burger, M. P. Kidd and J. H. van Vuuren, <a href="http://www.vuuren.co.za/papers/SOLSEnum.pdf">Enumeration of isomorphism classes of self-orthogonal Latin squares</a>, Ars Combinatoria, 97, pp. 143-152. %H A160368 M. P. Kidd, <a href="http://www.vuuren.co.za/main.php">A repository of self-orthogonal Latin squares</a> %Y A160368 Cf. A160365, A160366, n!*A160367. %K A160368 hard,more,nonn %O A160368 1,4 %A A160368 _Martin P Kidd_, May 11 2009 %E A160368 References updated and a link updated by _Martin P Kidd_, Aug 14 2010