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

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =6a(5) =13a(6) =4a(7) =80a(8) =242a(9) =109a(10) =1702a(11) =5177a(12) =2208a(13) =40348a(14) =128560a(15) =56864a(16) =1052102a(17) =3406333a(18) =1509862a(19) =28900645a(20) =94971462a(21) =42420281a(22) =825816148a(23) =2740269448a(24) =1228678588a(25) =24277298940a(26) =81183221736a(27) =36526643608a(28) =729682028652