Expansion of 2/(1-x+sqrt(1-2*x-27*x^2)).

Terms

a(0) =1a(1) =1a(2) =8a(3) =22a(4) =141a(5) =561a(6) =3291a(7) =15583a(8) =88691a(9) =459187a(10) =2599570a(11) =14136200a(12) =80391235a(13) =450046143a(14) =2579291352a(15) =14710321998a(16) =85002979083a(17) =491050703739