Number of distinct means of subsets of {1..n}, where {} has mean 0.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =10a(5) =16a(6) =26a(7) =38a(8) =56a(9) =78a(10) =106a(11) =138a(12) =180a(13) =226a(14) =284a(15) =348a(16) =420a(17) =500a(18) =596a(19) =698a(20) =818a(21) =946a(22) =1086a(23) =1236a(24) =1408a(25) =1588a(26) =1788a(27) =2000a(28) =2230a(29) =2472