Expansion of g.f. (1+2*x+3*x^2)/(1-x-x^2-x^3-x^4).

Terms

a(0) =1a(1) =3a(2) =7a(3) =11a(4) =22a(5) =43a(6) =83a(7) =159a(8) =307a(9) =592a(10) =1141a(11) =2199a(12) =4239a(13) =8171a(14) =15750a(15) =30359a(16) =58519a(17) =112799a(18) =217427a(19) =419104a(20) =807849a(21) =1557179a(22) =3001559a(23) =5785691a(24) =11152278a(25) =21496707a(26) =41436235a(27) =79870911a(28) =153956131a(29) =296759984