The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #7 Feb 28 2020 05:33:45
%S 0,0,0,1,0,1,1,5,4,19,26,163,445,2302,10798,63690,381883,2550827,
%T 17945643
%N Species of ordered Latin bi-trades of size n.
%H I. M. Wanless, <a href="https://ajc.maths.uq.edu.au/pdf/39/ajc_v39_p247.pdf">A computer enumeration of small latin trades</a>, Australas. J. Combin. 39, (2007) 247-258.
%Y Cf. A007083.
%K nonn,more
%O 1,8
%A _Ian Wanless_, Oct 11 2007