G.f. x*(x^2+1)*(x^3-x-1)/((2*x^3+x^2-1)*(x^4+1)).

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =3a(6) =5a(7) =8a(8) =11a(9) =19a(10) =29a(11) =42a(12) =67a(13) =99a(14) =149a(15) =232a(16) =347a(17) =531a(18) =813a(19) =1226a(20) =1875a(21) =2851a(22) =4325a(23) =6600a(24) =10027a(25) =15251a(26) =23229a(27) =35306a(28) =53731a(29) =81763