Transposition classes of Latin trades of size n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =2a(6) =1a(7) =9a(8) =7a(9) =40a(10) =63a(11) =401a(12) =1202a(13) =6503a(14) =31505a(15) =187643a(16) =1137602a(17) =7617639a(18) =53688610