Number of sensed 3-connected planar maps with n edges.

Terms

a(0) =1a(1) =0a(2) =1a(3) =2a(4) =3a(5) =4a(6) =15a(7) =32a(8) =89a(9) =266a(10) =797a(11) =2496a(12) =8012a(13) =26028a(14) =85888a(15) =286608a(16) =965216a(17) =3278776a(18) =11221548a(19) =38665192a(20) =134050521a(21) =467382224a(22) =1638080277a(23) =5768886048a(24) =20407622631a(25) =72494277840a(26) =258527335373a(27) =925322077852