Sum of proper divisors of Catalan number A000108(n).

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =10a(5) =54a(6) =204a(7) =243a(8) =1594a(9) =4210a(10) =18484a(11) =62174a(12) =275828a(13) =1131980a(14) =7434360a(15) =10522755a(16) =72469530a(17) =268486410a(18) =1442238420a(19) =4284331050a(20) =18146556060a(21) =62021100660a(22) =248289237960a(23) =798007353390