Expansion of (1-x)*(1-3*x)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).

Terms

a(0) =1a(1) =5a(2) =20a(3) =75a(4) =275a(5) =1001a(6) =3639a(7) =13243a(8) =48280a(9) =176341a(10) =645150a(11) =2363596a(12) =8669142a(13) =31825005a(14) =116914020a(15) =429737220a(16) =1580244061a(17) =5812839156a(18) =21387636101a(19) =78708626396a(20) =289699273501