G.f.: (1+x+x^3+x^5)/( (1-x^2+x^3)*(1-x-x^3) ).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =11a(6) =15a(7) =23a(8) =32a(9) =49a(10) =69a(11) =105a(12) =149a(13) =225a(14) =321a(15) =482a(16) =691a(17) =1033a(18) =1487a(19) =2215a(20) =3199a(21) =4751a(22) =6880a(23) =10193a(24) =14793a(25) =21873a(26) =31801a(27) =46945a(28) =68353a(29) =100770