369581

Properties

Appears in sequences

• a(n) = largest prime in the factorization of n-th Franel number (A000172).at n=7A058854
• a(1) = 1, a(n) = prime equal to n-th partial sum of A073852.at n=31A073854
• Numbers k such that (2^k + 1)^2 - 2 = 4^k + 2^(k+1) - 1 is prime.at n=46A091513
• Primes p such that q-p = 56, where q is the next prime after p.at n=9A204667
• a(n) is the smallest n-isolated prime, or a(n)=0 if there are no n-isolated primes.at n=30A218275
• Least prime divisor of Fr(n) which does not divide any Fr(k) with k < n, or 1 if such a primitive prime divisor of Fr(n) does not exist, where Fr(n) denotes the n-th Franel number given by A000172.at n=7A242169
• Prime numbersat n=31493