Numbers n such that Catalan(n)-1 is prime.

Terms

a(0) =4a(1) =5a(2) =6a(3) =8a(4) =9a(5) =18a(6) =25a(7) =66a(8) =87a(9) =134a(10) =145a(11) =200a(12) =384a(13) =443a(14) =502a(15) =589a(16) =625a(17) =638a(18) =1082a(19) =1235a(20) =1236a(21) =1439a(22) =1892a(23) =2014a(24) =2355a(25) =2380a(26) =2592a(27) =2676a(28) =2981a(29) =3406