Expansion of x*(1 + 3*x)/(1 - 2*x - 25*x^2).

Terms

a(0) =1a(1) =5a(2) =35a(3) =195a(4) =1265a(5) =7405a(6) =46435a(7) =277995a(8) =1716865a(9) =10383605a(10) =63688835a(11) =386967795a(12) =2366156465a(13) =14406507805a(14) =87966927235a(15) =536096549595