2476098domain: NAppears in sequencesJordan function J_5(n).at n=18A059378a(n) = n^5 - 1.at n=18A258807a(n) = Sum_{d|n, n/d==1 mod 4} d^5 - Sum_{d|n, n/d==3 mod 4} d^5.at n=18A321829