828583domain: NAppears in sequencesa(n) = n^n + n!.at n=6A053042a(n) = n! * Sum_{d|n} d^d / d!.at n=6A354888a(n) = n! * Sum_{d|n} d^n / d!.at n=6A354890a(n) = n! * Sum_{d|n} d^n / d!^(n/d).at n=6A358595