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

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =12a(6) =30a(7) =76a(8) =196a(9) =512a(10) =1353a(11) =3610a(12) =9713a(13) =26324a(14) =71799a(15) =196938a(16) =542895a(17) =1503312a(18) =4179603a(19) =11662902a(20) =32652735a(21) =91695540a(22) =258215664a(23) =728997192a(24) =2062967382a(25) =5850674704a(26) =16626415975a(27) =47337954326a(28) =135015505407a(29) =385719506620