Number of bipartite polyhedral graphs with n nodes.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =5a(5) =5a(6) =21a(7) =40a(8) =176a(9) =500a(10) =2053a(11) =7532a(12) =31206a(13) =124552a(14) =521332a(15) =2167599a(16) =9183879a(17) =38965327a(18) =166956753a(19) =718004565a(20) =3107450143a(21) =13502835176a(22) =58956369552a(23) =258398671525