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

Terms

a(0) =1a(1) =4a(2) =26a(3) =184a(4) =1366a(5) =10424a(6) =80996a(7) =637424a(8) =5064166a(9) =40528984a(10) =326251276a(11) =2638751504a(12) =21426682876a(13) =174563719984