Expansion of (1 - x - x^2 - sqrt(1 - 2*x - 5*x^2 - 2*x^3 + x^4)) / (2*x + 2*x^2).

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =7a(5) =19a(6) =53a(7) =153a(8) =453a(9) =1367a(10) =4191a(11) =13015a(12) =40857a(13) =129441a(14) =413337a(15) =1328971a(16) =4298727a(17) =13978971a(18) =45673981a(19) =149867513a(20) =493638797a(21) =1631616239a(22) =5410015615a(23) =17990076527a(24) =59981630321a(25) =200476419713a(26) =671564145137