Triangulations of the disk G_{n,2}.

Terms

a(0) =1a(1) =5a(2) =21a(3) =119a(4) =735a(5) =4830a(6) =33253a(7) =237336a(8) =1743588a(9) =13114465a(10) =100591491a(11) =784428522a(12) =6204258970a(13) =49675571820a(14) =402013608525