If 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.
A052805
If 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.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =7a(5) =21a(6) =64a(7) =204a(8) =666a(9) =2236a(10) =7625a(11) =26419a(12) =92644a(13) =328370a(14) =1174234a(15) =4231898a(16) =15354424a(17) =56042372a(18) =205626906a(19) =758021598a(20) =2806143522a(21) =10427671924a(22) =38882984840a(23) =145443260702a(24) =545598228056
External references
- oeis: A052805