116507domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = 3 A113405(n)- A113405(n+1).at n=20A133511a(n) = 3*A131090(n) - A131090(n+1).at n=20A135261Primes of the form k!6+27, where k!6 is the sextuple factorial number (A085158).at n=7A288616Prime numbersat n=11005