Isotopy classes of Latin trades of size n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =3a(6) =1a(7) =13a(8) =10a(9) =66a(10) =112a(11) =723a(12) =2283a(13) =12616a(14) =62163a(15) =372147a(16) =2268021a(17) =15209245a(18) =107306496