A133177 - OEIS

%I #9 Feb 28 2020 05:34:24

%S 0,0,0,1,0,3,1,13,10,66,112,723,2283,12616,62175,372420,2269398,

%T 15225551,107457456

%N Isotopy classes 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 1,6

%A _Ian Wanless_, Oct 11 2007