Number of planar graphs with n edges and no isolated nodes.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =11a(5) =26a(6) =68a(7) =177a(8) =497a(9) =1475a(10) =4608a(11) =15188a(12) =52778a(13) =192339a(14) =733676a(15) =2917722a(16) =12052138a(17) =51517308a(18) =227068741a(19) =1028492568