G.f. A(x) satisfies A(x) = 1 + x^5*A(x)^5 / (1 - x*A(x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =6a(11) =12a(12) =19a(13) =27a(14) =36a(15) =81a(16) =177a(17) =341a(18) =592a(19) =951a(20) =1726a(21) =3417a(22) =6766a(23) =12812a(24) =22951a(25) =41531a(26) =78222a(27) =151291a(28) =291957a(29) =550015