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

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =0a(7) =0a(8) =5a(9) =11a(10) =6a(11) =0a(12) =35a(13) =120a(14) =136a(15) =51a(16) =285a(17) =1330a(18) =2310a(19) =1771a(20) =3036a(21) =14950a(22) =35100a(23) =40950a(24) =47502a(25) =175392a(26) =503440a(27) =791120a(28) =927520a(29) =2272424