Number of distinct connected unicyclic bipartite graphs with n vertices.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =5a(6) =10a(7) =34a(8) =85a(9) =254a(10) =690a(11) =1997a(12) =5582a(13) =15975a(14) =45244a(15) =129254a(16) =368215a(17) =1052961a(18) =3010169a(19) =8622273a(20) =24709964a(21) =70902886a(22) =203594559a(23) =585163116a(24) =1683079071a(25) =4844758076a(26) =13955265122a(27) =40225474849a(28) =116021495035a(29) =334843170810