G.f. satisfies: A(x) = exp( Sum_{n>=1} A(x^n)/(1+x^n) * x^n/n ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =9a(7) =16a(8) =29a(9) =54a(10) =102a(11) =194a(12) =375a(13) =730a(14) =1434a(15) =2837a(16) =5650a(17) =11311a(18) =22767a(19) =46023a(20) =93422a(21) =190322a(22) =389037a(23) =797613a(24) =1639878a(25) =3380099a(26) =6983484a(27) =14459570a(28) =29999618a(29) =62357426