Number of partitions of n into at most 1 copy of 1, 2 copies of 2, 3 copies of 3, ... .

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =5a(7) =7a(8) =10a(9) =13a(10) =17a(11) =22a(12) =28a(13) =36a(14) =46a(15) =58a(16) =73a(17) =91a(18) =114a(19) =141a(20) =173a(21) =213a(22) =261a(23) =318a(24) =387a(25) =469a(26) =567a(27) =683a(28) =821a(29) =984