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%I #11 Jan 12 2020 11:26:56
%S 1,4,11,43,155,761,4043,27190
%N Number of orbits of Sym(n)^2 under action of Iso_1(n).
%H Mathieu Bogaerts and Peter Dukes, <a href="http://dx.doi.org/10.1016/j.disc.2014.03.002">Semidefinite programming for permutation codes</a>, Discrete Math. 326 (2014), 34--43. MR3188985.
%F Proposition 3.2 of Bogaerts et al. gives an explicit formula.
%Y Cf. A241585, A110143.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, May 12 2014