Number of unlabeled simple graphs covering n vertices such that it is possible to choose a different vertex from each edge (choosable).

A368834

Number of unlabeled simple graphs covering n vertices such that it is possible to choose a different vertex from each edge (choosable).

Terms

    a(0) =1a(1) =0a(2) =1a(3) =2a(4) =5a(5) =10a(6) =27a(7) =62a(8) =165a(9) =423a(10) =1140a(11) =3060a(12) =8427a(13) =23218a(14) =64782a(15) =181370a(16) =511004a(17) =1444285a(18) =4097996a(19) =11656644a(20) =33243265a(21) =94992847a(22) =271953126a(23) =779790166a(24) =2239187466a(25) =6438039076a(26) =18532004323a(27) =53400606823a(28) =154024168401a(29) =444646510812

External references