E.g.f. satisfies A(x) = exp(x*A(-x^3)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-23a(5) =-119a(6) =-359a(7) =1681a(8) =38641a(9) =269137a(10) =599761a(11) =-22461119a(12) =-347288039a(13) =-8704873319a(14) =-73184815703a(15) =16491842641