Expansion of g.f. x^2/(1 - 2*x - 25*x^2).

Terms

a(0) =0a(1) =1a(2) =2a(3) =29a(4) =108a(5) =941a(6) =4582a(7) =32689a(8) =179928a(9) =1177081a(10) =6852362a(11) =43131749a(12) =257572548a(13) =1593438821a(14) =9626191342a(15) =59088353209a(16) =358831489968