280019domain: NAppears in sequencesFourth step in Goodstein sequences, i.e., g(6) if g(2)=n: write g(5)=A059934(n) in hereditary representation base 5, bump to base 6, then subtract 1 to produce g(6).at n=9A059935a(n) = G_n(12), where G is the Goodstein function defined in A266201.at n=4A271559