Partial sums of A000009 (partitions into distinct parts).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =10a(6) =14a(7) =19a(8) =25a(9) =33a(10) =43a(11) =55a(12) =70a(13) =88a(14) =110a(15) =137a(16) =169a(17) =207a(18) =253a(19) =307a(20) =371a(21) =447a(22) =536a(23) =640a(24) =762a(25) =904a(26) =1069a(27) =1261a(28) =1483a(29) =1739