251737

Properties

Appears in sequences

• Numbers n such that prime(n) == -1 (mod n).at n=15A045924
• Duplicate of A045924.at n=15A049204
• Primes p such that gcd(p, prime(p)^2 - 1) does not equal 1.at n=5A064936
• Numbers n such that p(n) is congruent to EulerPhi(n) mod n, where p(n) denotes the n-th prime.at n=6A066685
• Values of transition of A072608(n) from alternating behavior (0,1,0,1,..) into steadily-1 (1,1,1,..) behavior or changing back. Expressing in terms of A072609(n): at n values it switches from steadily 0 into steadily 1 successive values or back.at n=26A072610
• Numbers n such that Fibonacci(n) == prime(n) (mod n).at n=15A076519
• Numbers k that divide prime(k)+1 or prime(k)-1.at n=26A078931
• Numbers n such that n is the largest prime factor of 1 + prime(n).at n=3A101445
• a(n) is the smallest number m such that prime(m) = n*m - 1, or 0 if no such m exists.at n=13A108511
• Integers k such that sigma(k) + prime(k) is divisible by k.at n=10A111360
• Right-truncatable, reversible primes in base 16.at n=35A238851
• Prime values of pi(n) that divide n.at n=11A256394
• Numbers k such that floor(prime(k)/k) < floor(prime(k+1)/(k+1)).at n=23A308082
• Prime numbersat n=22182