Number of connected 4-regular simple graphs on n vertices with girth exactly 3.

A184943

Number of connected 4-regular simple graphs on n vertices with girth exactly 3.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =2a(8) =5a(9) =16a(10) =57a(11) =263a(12) =1532a(13) =10747a(14) =87948a(15) =803885a(16) =8020590a(17) =86027734a(18) =983417704a(19) =11913817317a(20) =152352034707

External references