Number of parts in all partitions of n into distinct parts.

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =5a(5) =8a(6) =10a(7) =13a(8) =18a(9) =25a(10) =30a(11) =40a(12) =49a(13) =63a(14) =80a(15) =98a(16) =119a(17) =149a(18) =179a(19) =218a(20) =266a(21) =318a(22) =380a(23) =455a(24) =541a(25) =640a(26) =760a(27) =895a(28) =1050a(29) =1234