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Number of isomorphism classes of idempotent self-orthogonal Latin squares of order n.
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%I #9 Mar 31 2012 20:24:49

%S 1,0,0,1,2,0,8,8,283,243284

%N Number of isomorphism classes of idempotent self-orthogonal Latin squares of order n.

%C A self-orthogonal Latin square (SOLS) is a Latin square orthogonal to its transpose. Two SOLS L and L' are isomorphic if a permutation applied to the rows, columns and symbols of L maps L to L'.

%D 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 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.

%K nonn

%O 1,5

%A _Martin P Kidd_, Nov 01 2010