54919

Properties

Appears in sequences

• Numbers k such that (17^k - 1)/16 is prime.at n=9A006034
• Numbers whose set of base-15 digits is {1,4}.at n=35A032827
• Odd prime values of sigma(k) - phi(k) taking k in increasing order.at n=47A068419
• Primes p such that x^9 = 2 has a solution mod p, but x^(9^2) = 2 has no solution mod p.at n=25A070185
• a(0) = 1; a(n) = Sum_{k=0..floor(n/3)} binomial(n-2*k,k) * a(k).at n=26A352039
• Beginning with 13, least prime such that concatenation of first n terms and its digit reversal both are primes.at n=11A382898
• Prime numbersat n=5584