G.f. A(x) satisfies A(x) = 1 + x*abs( 1/A(x) )^2.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =2a(5) =7a(6) =16a(7) =32a(8) =26a(9) =119a(10) =314a(11) =687a(12) =600a(13) =2940a(14) =8104a(15) =18404a(16) =16618a(17) =84447a(18) =238454a(19) =553121a(20) =509362a(21) =2645367a(22) =7582080a(23) =17828384a(24) =16631704a(25) =87642628a(26) =253770136a(27) =602394756a(28) =567132656a(29) =3019835984