Expansion of g.f. A(x) satisfying A(x)^4 = A( x*A(x)^3/(1 - A(x)) ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =48a(6) =160a(7) =549a(8) =1930a(9) =6919a(10) =25200a(11) =92976a(12) =346757a(13) =1305140a(14) =4951216a(15) =18912245a(16) =72675115a(17) =280761688a(18) =1089800460a(19) =4248151335a(20) =16623220558a(21) =65273436984a(22) =257115848688