Number of partitions of n such that some part is a sum of two other parts.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =3a(7) =3a(8) =8a(9) =10a(10) =17a(11) =22a(12) =37a(13) =47a(14) =71a(15) =91a(16) =133a(17) =170a(18) =236a(19) =301a(20) =408a(21) =515a(22) =686a(23) =860a(24) =1119a(25) =1401a(26) =1798a(27) =2232a(28) =2829a(29) =3495