4783697domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 3^k + 3^m - 1, where k and m are positive integers.at n=37A234346Primes of the form m = 3^i + 3^j - 1, where i > j >= 0.at n=32A239713Primes of the form m = 9^i + 9^j - 1, where i > j >= 0.at n=8A239719Prime numbersat n=334396