Numbers k such that f(k) > f(m) for all m < k, where f(k) = usigma(usigma(usigma(k)))/usigma(usigma(k)) and usigma(k) is the sum of unitary divisors of k (A034448).

A297364

Numbers k such that f(k) > f(m) for all m < k, where f(k) = usigma(usigma(usigma(k)))/usigma(usigma(k)) and usigma(k) is the sum of unitary divisors of k (A034448).

Terms

    a(0) =1a(1) =2a(2) =4a(3) =10a(4) =138a(5) =163a(6) =2511a(7) =36943a(8) =408403a(9) =9869857a(10) =11051023

External references