Number of simple unlabeled graphs with n nodes of 2 colors whose components are cycles.

Terms

a(0) =1a(1) =0a(2) =0a(3) =4a(4) =6a(5) =8a(6) =23a(7) =42a(8) =83a(9) =166a(10) =324a(11) =622a(12) =1236a(13) =2366a(14) =4595a(15) =8900a(16) =17225a(17) =33212a(18) =64376a(19) =124360a(20) =240819a(21) =466284a(22) =904149a(23) =1753782a(24) =3407225a(25) =6623274a(26) =12892131a(27) =25116456a(28) =48987833a(29) =95633480