Number of partitions of n into terms of (1,2)-Ulam sequence, cf. A002858.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =6a(6) =10a(7) =12a(8) =18a(9) =22a(10) =30a(11) =37a(12) =50a(13) =60a(14) =78a(15) =94a(16) =120a(17) =143a(18) =179a(19) =213a(20) =262a(21) =309a(22) =376a(23) =440a(24) =531a(25) =618a(26) =737a(27) =855a(28) =1012a(29) =1167