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

Terms

a(0) =1a(1) =1a(2) =-1a(3) =2a(4) =-4a(5) =9a(6) =-22a(7) =55a(8) =-142a(9) =376a(10) =-1011a(11) =2758a(12) =-7614a(13) =21220a(14) =-59630a(15) =168759a(16) =-480533a(17) =1375676a(18) =-3957075a(19) =11430582a(20) =-33144264a(21) =96434321a(22) =-281447954a(23) =823734157a(24) =-2417092933a(25) =7109265120a(26) =-20955593252a(27) =61893804180a(28) =-183148075432a(29) =542885589115