Number of connected 4-regular simple graphs on n vertices with girth at least 4.
A033886
Number of connected 4-regular simple graphs on n vertices with girth at least 4.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =0a(10) =2a(11) =2a(12) =12a(13) =31a(14) =220a(15) =1606a(16) =16828a(17) =193900a(18) =2452818a(19) =32670330a(20) =456028474a(21) =6636066099a(22) =100135577747
External references
- oeis: A033886