Number of partitions of n into parts 3k or 3k+2.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =2a(8) =5a(9) =5a(10) =6a(11) =9a(12) =11a(13) =11a(14) =18a(15) =19a(16) =23a(17) =31a(18) =36a(19) =40a(20) =56a(21) =60a(22) =73a(23) =92a(24) =105a(25) =121a(26) =155a(27) =170a(28) =204a(29) =247