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

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =3a(5) =5a(6) =14a(7) =28a(8) =75a(9) =170a(10) =443a(11) =1076a(12) =2795a(13) =7046a(14) =18398a(15) =47458a(16) =124793a(17) =326905a(18) =865853a(19) =2293103a(20) =6114688a(21) =16327765a(22) =43800590a(23) =117720693a(24) =317452606a(25) =857742087a(26) =2323588888a(27) =6306229600a(28) =17151172495a(29) =46725729232