Number of Tom graphs with n vertices.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =10a(6) =20a(7) =37a(8) =76a(9) =153a(10) =328a(11) =705a(12) =1576a(13) =3551a(14) =8179a(15) =18980a(16) =44559a(17) =105111a(18) =249426a(19) =593484a(20) =1416269a(21) =3384581a(22) =8099819a(23) =19398194a(24) =46487665a(25) =111447044a(26) =267260387a(27) =641022947a(28) =1537706522a(29) =3688974818