2414250301domain: NAppears in sequencesa(n) is the largest prime factor of 2^n + 3^n.at n=21A094474Primes p such that k=p*23^2 divides 3^(k-1) - 2^(k-1); or primes in A130058.at n=11A130059Sum of odd powers of 4 and 9 divided by 13.at n=5A165259Primes of form (2^n + 3^n)/13.at n=3A181636