G.f. A(x) satisfies: A(x) = Product_{k>=1} 1/(1 + x^k*A(x)^k)^k.

Terms

a(0) =1a(1) =-1a(2) =0a(3) =0a(4) =6a(5) =-16a(6) =16a(7) =-34a(8) =217a(9) =-681a(10) =1343a(11) =-3466a(12) =13370a(13) =-42380a(14) =109477a(15) =-312448a(16) =1040248a(17) =-3267138a(18) =9447529a(19) =-28367596a(20) =90504001a(21) =-283611105a(22) =861087913a(23) =-2654231074a(24) =8386506600a(25) =-26359974392a(26) =81902319183a(27) =-256179313766a(28) =809890745232