101917domain: NPropertiesPrimalityPrimeyesAppears in sequencesLargest prime factor of 3^n + 1.at n=19A074476A B3-sequence: a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that the sums of any three terms are all distinct.at n=33A096772Primes in A059504.at n=21A109775Prime numbersat n=9758