G.f. satisfies A(x) = 1 + x*A(x) / (1 + x*A(x))^5.

Terms

a(0) =1a(1) =1a(2) =-4a(3) =1a(4) =46a(5) =-129a(6) =-405a(7) =3319a(8) =-1617a(9) =-59258a(10) =199541a(11) =642170a(12) =-6038395a(13) =3886091a(14) =119884973a(15) =-440626784a(16) =-1367688245a(17) =14055527190a(18) =-11043763380a(19) =-290488387366