Expansion of (1+x)/(1-x^2-9*x^3).

Terms

a(0) =1a(1) =1a(2) =1a(3) =10a(4) =10a(5) =19a(6) =100a(7) =109a(8) =271a(9) =1009a(10) =1252a(11) =3448a(12) =10333a(13) =14716a(14) =41365a(15) =107713a(16) =173809a(17) =479998a(18) =1143226a(19) =2044279a(20) =5463208a(21) =12333313a(22) =23861719a(23) =61502185a(24) =134861536a(25) =276257656a(26) =688381201a(27) =1490011480a(28) =3174700105a(29) =7685442289