Number of unlabeled graphs on n nodes whose components are cycles or complete graphs.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =9a(6) =15a(7) =22a(8) =35a(9) =51a(10) =77a(11) =110a(12) =162a(13) =228a(14) =326a(15) =454a(16) =637a(17) =875a(18) =1208a(19) =1641a(20) =2235a(21) =3006a(22) =4044a(23) =5388a(24) =7177a(25) =9481a(26) =12510a(27) =16399a(28) =21463a(29) =27932