13996800000domain: NAppears in sequencesNumbers k such that phi^e(k) > phi^e(m) for all m < k, where phi^e(k) = A072911(k) is the number of divisors d of k such that d and k are exponentially coprime.at n=21A307004Numbers at which the sum of the iterated exponential totient function (A331273) attains a record.at n=20A331407