855935016215domain: NAppears in sequencesGoodstein numbers: a(n) = G_n(n), where G is the Goodstein function.at n=9A266201a(n) = G_n(9), where G is the Goodstein function defined in A266201.at n=9A271556G_9(n), where G is the Goodstein function defined in A266201.at n=6A271985