a(n) is the number of c-nets with n+1 vertices and 2n+1 edges, n >= 1.
A001507
a(n) is the number of c-nets with n+1 vertices and 2n+1 edges, n >= 1.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =3a(4) =33a(5) =338a(6) =3580a(7) =39525a(8) =452865a(9) =5354832a(10) =65022840a(11) =807560625a(12) =10224817515a(13) =131631305718
External references
- oeis: A001507