92644domain: NAppears in sequencesIf B is a collection in which there are C(n-1) [Catalan numbers, A000108] things with n points, a(n) is the number of subsets without repetition of B with a total of n points.at n=12A052805Numbers k such that k-3, k-5, k-17, k-257, and k-65537 are all primes.at n=11A063825