9990233352domain: NAppears in sequencesJ_n(n), where J is the Jordan function, J_n(n) = n^n product{p|n}(1 - 1/p^n), the product is over the distinct primes, p, dividing n.at n=9A067858Jordan function J_10(n).at n=9A069095a(n) = Sum_{d|n} mu(d)*d^n.at n=9A321222