22270249domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the largest prime factor of 2^n + 3^n.at n=32A094474Primes p such that k=p*23^2 divides 3^(k-1) - 2^(k-1); or primes in A130058.at n=8A130059Prime numbersat n=1405127