Transposition classes of unordered Latin bi-trades of size n.
A133174
Transposition classes of unordered Latin bi-trades of size n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =2a(6) =1a(7) =9a(8) =5a(9) =36a(10) =42a(11) =313a(12) =685a(13) =3999a(14) =16535a(15) =100897a(16) =577324a(17) =3886229a(18) =26982310
External references
- oeis: A133174