Triangulations of the disk G_{3,n}.

Terms

a(0) =5a(1) =26a(2) =119a(3) =538a(4) =2310a(5) =9882a(6) =41715a(7) =175088a(8) =730626a(9) =3037510a(10) =12584726a(11) =52003792a(12) =214401024a(13) =882233898a(14) =3624161175a(15) =14865947668a(16) =60898934250a(17) =249184153548