Triangle read by rows: numbers of Dyck paths.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =3a(6) =1a(7) =6a(8) =14a(9) =14a(10) =1a(11) =10a(12) =40a(13) =84a(14) =84a(15) =1a(16) =15a(17) =90a(18) =300a(19) =594a(20) =594a(21) =1a(22) =21a(23) =175a(24) =825a(25) =2475a(26) =4719a(27) =4719a(28) =1a(29) =28