Expansion of x/(1 - 3*x + x^2 + x^3 - x^4).

Terms

a(0) =1a(1) =3a(2) =8a(3) =20a(4) =50a(5) =125a(6) =313a(7) =784a(8) =1964a(9) =4920a(10) =12325a(11) =30875a(12) =77344a(13) =193752a(14) =485362a(15) =1215865a(16) =3045825a(17) =7630000a(18) =19113672a(19) =47881056a(20) =119945321a(21) =300471235a(22) =752701000a(23) =1885567500a(24) =4723475586a(25) =11832629493a(26) =29641546393a(27) =74254101600