Expansion of (1-2*x-2*x^2-sqrt(1-4*x-4*x^2+8*x^3+4*x^4))/(2*x^2).

Terms

a(0) =1a(1) =2a(2) =7a(3) =22a(4) =76a(5) =268a(6) =977a(7) =3638a(8) =13804a(9) =53164a(10) =207342a(11) =817212a(12) =3250104a(13) =13026744a(14) =52567461a(15) =213394854a(16) =870845260a(17) =3570590668a(18) =14701822370a(19) =60765209876a(20) =252021314536