Expansion of (1+2*x) / (1-x-6*x^2+2*x^3).

Terms

a(0) =1a(1) =3a(2) =9a(3) =25a(4) =73a(5) =205a(6) =593a(7) =1677a(8) =4825a(9) =13701a(10) =39297a(11) =111853a(12) =320233a(13) =912757a(14) =2610449a(15) =7446525a(16) =21283705a(17) =60741957a(18) =173551137a(19) =495435469a(20) =1415258377a(21) =4040768917a(22) =11541448241a(23) =32955544989a(24) =94122696601a(25) =268773070053a(26) =767598159681