Expansion of g.f. (x^3+x^2+2*x+1)/(x^4+5*x^2+1).

Terms

a(0) =1a(1) =2a(2) =-4a(3) =-9a(4) =19a(5) =43a(6) =-91a(7) =-206a(8) =436a(9) =987a(10) =-2089a(11) =-4729a(12) =10009a(13) =22658a(14) =-47956a(15) =-108561a(16) =229771a(17) =520147a(18) =-1100899a(19) =-2492174a(20) =5274724a(21) =11940723a(22) =-25272721a(23) =-57211441a(24) =121088881a(25) =274116482a(26) =-580171684a(27) =-1313370969a(28) =2779769539a(29) =6292738363