A subclass of 2n-node trivalent planar graphs without triangles.

A006797

A subclass of 2n-node trivalent planar graphs without triangles.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =1a(4) =2a(5) =3a(6) =9a(7) =28a(8) =97a(9) =378a(10) =1601a(11) =7116

External references