37665879domain: NAppears in sequencesGoodstein numbers: a(n) = G_n(n), where G is the Goodstein function.at n=7A266201a(n) = G_n(7), where G is the Goodstein function defined in A266201.at n=7A271554G_7(n), where G is the Goodstein function defined in A266201.at n=4A271978