G.f. satisfies A(x) = 1 + x*A(x)*A(x^2)*A(x^3)*...*A(x^n)*...

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =15a(7) =30a(8) =57a(9) =111a(10) =214a(11) =415a(12) =798a(13) =1547a(14) =2983a(15) =5765a(16) =11132a(17) =21510a(18) =41528a(19) =80231a(20) =154940a(21) =299280a(22) =578017a(23) =1116450a(24) =2156280a(25) =4164827a(26) =8044023a(27) =15536655a(28) =30007988a(29) =57958900