G.f. A(x) satisfies: A( A(x)^4 - A(x)^5 ) = x*A(x)^3.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =37a(6) =111a(7) =345a(8) =1103a(9) =3603a(10) =11971a(11) =40328a(12) =137423a(13) =472829a(14) =1640328a(15) =5731315a(16) =20150376a(17) =71235454a(18) =253061855a(19) =902922756a(20) =3234281950a(21) =11626416055a(22) =41928973015a(23) =151656509670a(24) =550021604731