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

Terms

a(0) =1a(1) =2a(2) =12a(3) =56a(4) =304a(5) =1632a(6) =9024a(7) =50304a(8) =283392a(9) =1607168a(10) =9167872a(11) =52537344a(12) =302239744a(13) =1744412672a(14) =10096263168a(15) =58576306176a(16) =340566147072