Odd values of the PartitionsQ function A000009.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =15a(6) =27a(7) =89a(8) =165a(9) =585a(10) =1113a(11) =4097a(12) =7917a(13) =29927a(14) =58499a(15) =225585a(16) =444793a(17) =1741521a(18) =3457027a(19) =13699699a(20) =27342421a(21) =109420549a(22) =219358315a(23) =884987529a(24) =1780751883a(25) =7233519619a(26) =14600965705a(27) =59656252987a(28) =120742510607a(29) =495811828759