Expansion of g.f. (1-x-x^3+x^4-2*x^2)/((1-2*x)*(x-1)^2*(x+1)^2).

Terms

a(0) =-1a(1) =-1a(2) =-2a(3) =-1a(4) =-2a(5) =1a(6) =2a(7) =11a(8) =22a(9) =53a(10) =106a(11) =223a(12) =446a(13) =905a(14) =1810a(15) =3635a(16) =7270a(17) =14557a(18) =29114a(19) =58247a(20) =116494a(21) =233009a(22) =466018a(23) =932059a(24) =1864118a(25) =3728261a(26) =7456522a(27) =14913071a(28) =29826142a(29) =59652313