85991

Properties

Appears in sequences

• a(n) = least prime P(n) such that P(n)-2*p(n) is prime and P(n+1)>P(n) with p(n)=n-th prime.at n=9A115972
• a(n) is the smallest n-isolated prime, or a(n)=0 if there are no n-isolated primes.at n=22A218275
• Primes p where an integer r with 1 < r < p exists such that r^r == 1 (mod p^2).at n=3A259505
• Number of refinement sequences n -> ... -> {1}^n, where in each step one part that is the rightmost copy of its size is replaced by a partition of itself into smaller parts (in weakly decreasing order).at n=10A327702
• Primes prime(k) such that prime(k) + 2*prime(k+1), prime(k) + 2*prime(k+1) + 4*prime(k+2) and prime(k) + 2*prime(k+1) + 4*prime(k+2) + 8*prime(k+3) are all prime.at n=12A337214
• Prime numbersat n=8361