4353564671domain: NAppears in sequencesa(n) = 6^n/3 - 1.at n=12A164559Partial sums of A164532.at n=24A164560Primes of the form 2*6^k - 1.at n=5A319535Primes of the form k*m^(k*m) - 1 with m > 1.at n=7A333368