a(n) = (number of nonisomorphic nontransitive prime tournaments on n nodes) - Moebius(n).

A002638

a(n) = (number of nonisomorphic nontransitive prime tournaments on n nodes) - Moebius(n).

Terms

    a(0) =-1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =52a(6) =456a(7) =6873a(8) =191532a(9) =9733032a(10) =903753248a(11) =154108311046

External references