Minimal isotopy classes of Latin trades of size n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =3a(6) =0a(7) =6a(8) =3a(9) =23a(10) =12a(11) =146a(12) =205a(13) =1647a(14) =4694a(15) =32319a(16) =138384a(17) =942341a(18) =5258327