Number of partitions of n such that if the length is k then k is not a part.

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =4a(5) =5a(6) =9a(7) =11a(8) =18a(9) =23a(10) =34a(11) =44a(12) =63a(13) =80a(14) =111a(15) =142a(16) =190a(17) =242a(18) =319a(19) =402a(20) =522a(21) =655a(22) =837a(23) =1045a(24) =1322a(25) =1638a(26) =2053a(27) =2532a(28) =3144a(29) =3857