Number of ways to choose a set partition of the parts of a strict integer composition of n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =5a(5) =9a(6) =39a(7) =43a(8) =73a(9) =107a(10) =497a(11) =531a(12) =951a(13) =1345a(14) =2125a(15) =8789a(16) =9929a(17) =16953a(18) =24723a(19) =38347a(20) =52717a(21) =219131a(22) =240461a(23) =419715a(24) =600075a(25) =938689a(26) =1278409a(27) =1928453a(28) =6853853a(29) =7815657