Expansion of (1+3*x+x^2) / (1-x-5*x^2-2*x^3).

Terms

a(0) =1a(1) =4a(2) =10a(3) =32a(4) =90a(5) =270a(6) =784a(7) =2314a(8) =6774a(9) =19912a(10) =58410a(11) =171518a(12) =503392a(13) =1477802a(14) =4337798a(15) =12733592a(16) =37378186a(17) =109721742a(18) =322079856a(19) =945444938a(20) =2775287702a(21) =8146672104a(22) =23914000490a(23) =70197936414a(24) =206061283072a(25) =604878966122