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

A006798

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

Terms

    a(0) =1a(1) =1a(2) =4a(3) =13a(4) =58a(5) =279a(6) =1406a(7) =7525

External references