Number of 2-separable partitions of n; see Comments.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =6a(8) =7a(9) =10a(10) =12a(11) =16a(12) =20a(13) =25a(14) =31a(15) =39a(16) =47a(17) =59a(18) =71a(19) =87a(20) =105a(21) =128a(22) =153a(23) =185a(24) =221a(25) =265a(26) =315a(27) =377a(28) =445a(29) =530