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

Terms

a(0) =1a(1) =4a(2) =20a(3) =95a(4) =456a(5) =2184a(6) =10465a(7) =50140a(8) =240236a(9) =1151039a(10) =5514960a(11) =26423760a(12) =126603841a(13) =606595444a(14) =2906373380a(15) =13925271455a(16) =66719983896a(17) =319674648024