Triangle read by rows: differences of Narayana numbers.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =5a(6) =1a(7) =9a(8) =3a(9) =1a(10) =14a(11) =14a(12) =1a(13) =20a(14) =40a(15) =4a(16) =1a(17) =27a(18) =90a(19) =30a(20) =1a(21) =35a(22) =175a(23) =125a(24) =5a(25) =1a(26) =44a(27) =308a(28) =385a(29) =55