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

Terms

a(0) =1a(1) =5a(2) =16a(3) =36a(4) =69a(5) =117a(6) =184a(7) =272a(8) =385a(9) =525a(10) =696a(11) =900a(12) =1141a(13) =1421a(14) =1744a(15) =2112a(16) =2529a(17) =2997a(18) =3520a(19) =4100a(20) =4741a(21) =5445a(22) =6216a(23) =7056a(24) =7969a(25) =8957a(26) =10024a(27) =11172a(28) =12405a(29) =13725