G.f. A(x) satisfies A(x) = 1 + x*A(x)*(1 + x^4*A(x)^5).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =8a(7) =29a(8) =85a(9) =211a(10) =469a(11) =1003a(12) =2263a(13) =5734a(14) =15926a(15) =45188a(16) =124730a(17) =330583a(18) =850783a(19) =2175406a(20) =5650746a(21) =15064128a(22) =41006034a(23) =112492472a(24) =307511726a(25) =833907512a(26) =2247908392a(27) =6056190352a(28) =16390505332a(29) =44659671982