G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * x^k/(k * (1 + x^k)^2) ).

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =2a(8) =1a(9) =1a(10) =3a(11) =3a(12) =2a(13) =4a(14) =7a(15) =7a(16) =7a(17) =12a(18) =17a(19) =17a(20) =22a(21) =37a(22) =47a(23) =51a(24) =73a(25) =110a(26) =133a(27) =162a(28) =242a(29) =339