Number of unlabeled connected loopless multigraphs with n nodes of degree 4 or less.
A289157
Number of unlabeled connected loopless multigraphs with n nodes of degree 4 or less.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =37a(5) =146a(6) =772a(7) =4449a(8) =30307a(9) =228605a(10) =1921464a(11) =17652327a(12) =176162548a(13) =1893738334a(14) =21806975279a(15) =267636988052
External references
- oeis: A289157