Expansion of (1+3*x+9*x^2+12*x^3+11*x^4+3*x^5+x^6)/((1-x)^2*(1-x^2)^2*(1-x^3)).

Terms

a(0) =1a(1) =5a(2) =20a(3) =54a(4) =123a(5) =239a(6) =428a(7) =706a(8) =1107a(9) =1653a(10) =2386a(11) =3332a(12) =4543a(13) =6049a(14) =7910a(15) =10162a(16) =12873a(17) =16083a(18) =19870a(19) =24278a(20) =29393a(21) =35265a(22) =41988a(23) =49616a(24) =58253a(25) =67957a(26) =78840a(27) =90966a(28) =104455a(29) =119375