1001523179

Appears in sequences

• Largest prime factor of 3^(2n+1) - 1.at n=11A002591
• Largest prime factor of 3^n - 1.at n=22A074477
• a(n)=3*(3^prime(n)-1)/denominator(B(2*prime(n))) where prime(n)=n-th prime and B(k) denotes the k-th Bernoulli number.at n=6A090814
• List of primitive prime divisors of the numbers (3^k-1)/2 (A003462) for k>=2, in order of their occurrence.at n=28A129733
• Primes p such that gcd(ord_p(3), ord_p(5)) = 1.at n=10A383411