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

Terms

a(0) =1a(1) =7a(2) =31a(3) =109a(4) =334a(5) =937a(6) =2475a(7) =6267a(8) =15393a(9) =36976a(10) =87369a(11) =203915a(12) =471546a(13) =1082849a(14) =2473535a(15) =5627684a(16) =12765052a(17) =28887838a(18) =65260270a(19) =147233926a(20) =331842395a(21) =747355066a(22) =1682185342a(23) =3784718431a(24) =8512408455a(25) =19141037360a(26) =43032743620