G.f. satisfies A(x) = 1 + x*A(x) + x^4*A(x)^3.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =5a(6) =11a(7) =21a(8) =39a(9) =78a(10) =169a(11) =373a(12) =808a(13) =1727a(14) =3719a(15) =8153a(16) =18100a(17) =40315a(18) =89770a(19) =200250a(20) =448755a(21) =1010685a(22) =2284295a(23) =5173961a(24) =11740697a(25) =26699780a(26) =60863291a(27) =139045991a(28) =318247190a(29) =729572315