Number of unlabeled trivalent 3-connected bipartite planar graphs with 2n nodes.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =2a(7) =2a(8) =8a(9) =8a(10) =32a(11) =57a(12) =185a(13) =466a(14) =1543a(15) =4583a(16) =15374a(17) =50116a(18) =171168a(19) =582603a(20) =2024119a(21) =7057472a(22) =24873248a(23) =88111772a(24) =314301078a(25) =1126716000a(26) =4060375677a(27) =14697571234a(28) =53432834170a(29) =195015189626