428951domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n)=a(n-1)*a(n-2)*a(n-3)*(1/a(n-1)+1/a(n-2)+1/a(n-3)) starting with a(1)=a(2)=1 and a(3)=2.at n=7A074046Indices at which record values in A318291 occur.at n=15A318561Prime numbersat n=36071