Number of unlabeled connected loopless multigraphs with n edges rooted at one distinguished vertex.
A339036
Number of unlabeled connected loopless multigraphs with n edges rooted at one distinguished vertex.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =30a(5) =104a(6) =390a(7) =1518a(8) =6208a(9) =26372a(10) =116221a(11) =529341a(12) =2487054a(13) =12027502a(14) =59778867a(15) =304916272a(16) =1594273763a(17) =8535706749a(18) =46753269749a(19) =261771468438
External references
- oeis: A339036