Expansion of (sqrt(1+2x+9x^2)+x-1)/(2x).

Terms

a(0) =1a(1) =2a(2) =-2a(3) =-2a(4) =10a(5) =-6a(6) =-42a(7) =102a(8) =82a(9) =-782a(10) =814a(11) =3854a(12) =-12454a(13) =-5014a(14) =98694a(15) =-142218a(16) =-472158a(17) =1932258a(18) =19038a(19) =-14816994a(20) =27370410a(21) =64159962a(22) =-334154442a(23) =121279878a(24) =2418497010a(25) =-5523511086a(26) =-8914677362a(27) =61259567662a(28) =-44249714438