%I #22 Dec 10 2021 11:08:51

%S 1,0,1,1,3,0,34,45927,2203310919

%N Number of isotopism classes of ordered pairs of orthogonal Latin squares.

%C The following operations produce things that are counted as equivalent: simultaneous permutation of the rows or columns of both squares; permutation of the symbols within either square.

%H J. Egan and I. M. Wanless, <a href="http://dx.doi.org/10.1090/mcom/3010">Enumeration of MOLS of small order</a>, Mathematics of Computation 85, 2016, 799-824.

%H Ian Wanless, <a href="http://users.monash.edu.au/~iwanless/data/MOLS/">Data on MOLS</a>

%Y Cf. A129732, A266166, A266167.

%K nonn,more

%O 1,5

%A _Ian Wanless_, Dec 22 2015