G.f. satisfies A(x) = 1 + x/(1 + x^3) * A(x/(1 + x^3)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =0a(5) =-2a(6) =-5a(7) =-8a(8) =-5a(9) =13a(10) =57a(11) =117a(12) =110a(13) =-179a(14) =-1089a(15) =-2591a(16) =-2852a(17) =4370a(18) =30383a(19) =77884a(20) =88638a(21) =-165233a(22) =-1133248a(23) =-2963659a(24) =-3172087a(25) =8519500a(26) =53092522a(27) =135857134a(28) =122296383a(29) =-543728791