Number of unlabeled connected loopless multigraphs with n edges rooted at one oriented edge.
A339037
Number of unlabeled connected loopless multigraphs with n edges rooted at one oriented edge.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =41a(4) =160a(5) =641a(6) =2672a(7) =11479a(8) =50938a(9) =232830a(10) =1095151a(11) =5292990a(12) =26257328a(13) =133548307a(14) =695752146a(15) =3709509938a(16) =20224607541a(17) =112675185837a(18) =641016837378
External references
- oeis: A339037