Expansion of 1/sqrt(1+4*x+12*x^2).

Terms

a(0) =1a(1) =-2a(2) =0a(3) =16a(4) =-56a(5) =48a(6) =384a(7) =-1920a(8) =3168a(9) =8512a(10) =-66560a(11) =161280a(12) =113920a(13) =-2224640a(14) =7311360a(15) =-3354624a(16) =-69253632a(17) =306754560a(18) =-408059904a(19) =-1898029056a(20) =12054196224a(21) =-25377005568a(22) =-38874316800a(23) =443400781824a(25) =-52751204352