20000000211domain: NAppears in sequencesGoodstein numbers: a(n) = G_n(n), where G is the Goodstein function.at n=8A266201a(n) = G_n(8), where G is the Goodstein function defined in A266201.at n=8A271555G_8(n), where G is the Goodstein function defined in A266201.at n=5A271979