Number of partitions of n into parts each of which is used a different number of times.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =5a(6) =7a(7) =10a(8) =13a(9) =15a(10) =21a(11) =28a(12) =31a(13) =45a(14) =55a(15) =62a(16) =82a(17) =105a(18) =116a(19) =153a(20) =172a(21) =208a(22) =251a(23) =312a(24) =341a(25) =431a(26) =492a(27) =588a(28) =676a(29) =826