G.f. A(x) satisfies: A(x) = 1 + x + x^2 + x^3 + x^4 * A(x)^3.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =6a(7) =10a(8) =15a(9) =27a(10) =55a(11) =111a(12) =210a(13) =388a(14) =741a(15) =1473a(16) =2956a(17) =5856a(18) =11514a(19) =22806a(20) =45756a(21) =92394a(22) =186459a(23) =375867a(24) =759519a(25) =1541803a(26) =3140775a(27) =6407307a(28) =13081230a(29) =26745378