Expansion of x*(1 - x^2)/(1 - x + 7*x^2 + x^3).

Terms

a(0) =0a(1) =1a(2) =1a(3) =-7a(4) =-15a(5) =33a(6) =145a(7) =-71a(8) =-1119a(9) =-767a(10) =7137a(11) =13625a(12) =-35567a(13) =-138079a(14) =97265a(15) =1099385a(16) =556609a(17) =-7236351a(18) =-12231999a(19) =37865849a(20) =130726193a(21) =-122102751a(22) =-1075051951a(23) =-351058887a(24) =7296407521a(25) =10828871681a(26) =-39894922079a(27) =-122993431367a(28) =145442151505