G.f.: (Product_{j>=1} 1/(1-q^j)^2 + Product_{j>=1} 1/(1-q^(2*j)))/2.

Terms

a(0) =1a(1) =1a(2) =3a(3) =5a(4) =11a(5) =18a(6) =34a(7) =55a(8) =95a(9) =150a(10) =244a(11) =376a(12) =588a(13) =885a(14) =1340a(15) =1978a(16) =2922a(17) =4235a(18) =6130a(19) =8745a(20) =12442a(21) =17501a(22) =24533a(23) =34075a(24) =47156a(25) =64756a(26) =88594a(27) =120420a(28) =163075a(29) =219595