187243domain: NAppears in sequencesGoodstein numbers: a(n) = G_n(n), where G is the Goodstein function.at n=6A266201a(n) = G_n(6), where G is the Goodstein function defined in A266201.at n=6A266205G_6(n), where G is the Goodstein function defined in A266201.at n=3A271977