6145597domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = ceiling(n^n/n!).at n=18A073225a(n) = round(n^n/n!) where round(1/2)=1.at n=18A235496a(n) = round(n^n/n!) where round(1/2)=0.at n=18A240571Prime numbersat n=422162