Number of simple unlabeled n-node graphs of connectivity 1.

A052442

Number of simple unlabeled n-node graphs of connectivity 1.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =3a(4) =11a(5) =56a(6) =385a(7) =3994a(8) =67014a(9) =1973029a(10) =105731474a(11) =10439496931

External references