Expansion of g.f. A(x) satisfying A(x)^2 = A( x^2/(1-2*x)^3 ).

Terms

a(0) =1a(1) =3a(2) =9a(3) =31a(4) =117a(5) =459a(6) =1835a(7) =7449a(8) =30711a(9) =128601a(10) =546537a(11) =2354139a(12) =10260492a(13) =45173868a(14) =200578692a(15) =896865572a(16) =4033380894a(17) =18224524458a(18) =82664886074a(19) =376161628302