Number of undirected labeled graphs on n+3 nodes with exactly n cycle graphs as connected components.

A215773

Number of undirected labeled graphs on n+3 nodes with exactly n cycle graphs as connected components.

Terms

    a(0) =0a(1) =3a(2) =25a(3) =120a(4) =420a(5) =1190a(6) =2898a(7) =6300a(8) =12540a(9) =23265a(10) =40755a(11) =68068a(12) =109200a(13) =169260a(14) =254660a(15) =373320a(16) =534888a(17) =750975a(18) =1035405a(19) =1404480a(20) =1877260a(21) =2475858a(22) =3225750a(23) =4156100a(24) =5300100a(25) =6695325a(26) =8384103a(27) =10413900a(28) =12837720a(29) =15714520

External references