G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * x^k/(k * (1 + x^k)^3) ).

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =2a(5) =-4a(6) =-1a(7) =10a(8) =-3a(9) =-20a(10) =19a(11) =38a(12) =-70a(13) =-65a(14) =221a(15) =73a(16) =-640a(17) =117a(18) =1745a(19) =-1223a(20) =-4433a(21) =5770a(22) =10124a(23) =-22007a(24) =-18999a(25) =75063a(26) =19307a(27) =-235725a(28) =59665a(29) =685744