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

Terms

a(0) =1a(1) =1a(2) =6a(3) =45a(4) =395a(5) =3775a(6) =38146a(7) =400826a(8) =4335455a(9) =47951065a(10) =539823620a(11) =6165377836a(12) =71261299056a(13) =831990025420