11881408domain: NAppears in sequencesa(n) = Sum_{0<d|n, n/d odd} d^5.at n=25A096960a(n) = Sum_{d|n, n/d==1 mod 4} d^5 - Sum_{d|n, n/d==3 mod 4} d^5.at n=25A321829Sum of the 5th powers of the divisor complements of the odd proper divisors of n.at n=25A352051a(n) = Sum_{d|n} (d^2+1)^n.at n=4A367551