G.f. A(x) satisfies x = Sum_{n=-oo..+oo} (A(x) - A(x)^n)^(n+1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =10a(6) =21a(7) =56a(8) =148a(9) =359a(10) =906a(11) =2450a(12) =6571a(13) =17338a(14) =46777a(15) =128681a(16) =352859a(17) =967315a(18) =2679764a(19) =7474260a(20) =20860226a(21) =58375826a(22) =164197258a(23) =463322792a(24) =1309547562a(25) =3710517258a(26) =10543567357a(27) =30021808808a(28) =85628123727a(29) =244694423127