G.f. satisfies: A(x) = exp( Sum_{n>=1} A(-x^n)^3 * x^n/n ).

Terms

a(0) =1a(1) =1a(2) =-2a(3) =-5a(4) =24a(5) =81a(6) =-439a(7) =-1590a(8) =9144a(9) =34451a(10) =-206641a(11) =-799196a(12) =4936378a(13) =19442800a(14) =-122613798a(15) =-489411508a(16) =3134773097a(17) =12640278932a(18) =-81948641010a(19) =-333099985517