G.f. satisfies: A(x) = Sum_{n>=0} x^n * Sum_{k=0..n} x^k * {[x^k] A(x)^n}.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =9a(5) =14a(6) =42a(7) =67a(8) =221a(9) =352a(10) =1154a(11) =1855a(12) =6222a(13) =10024a(14) =33698a(15) =54520a(16) =184823a(17) =299668a(18) =1019099a(19) =1656234a(20) =5654308a(21) =9205166a(22) =31501343a(23) =51366338a(24) =176178460a(25) =287662788a(26) =988329204a(27) =1615679329a(28) =5559353908a(29) =9097789494