181224

Appears in sequences

• Number of connected trivalent graphs with 2n nodes and girth exactly 6.at n=13A006926
• Seventh convolution of A000129(n+1) (generalized (2,1)-Fibonacci, called Pell numbers), n>=0, with itself.at n=6A073384
• Irregular triangle E(n,g) counting not necessarily connected 3-regular simple graphs on 2n vertices with girth exactly g.at n=39A185130
• Number of not necessarily connected 3-regular simple graphs on 2n vertices with girth exactly 6.at n=13A185136
• Irregular triangle C(n,g) counting connected trivalent simple graphs on 2n vertices with girth exactly g.at n=39A198303