25657

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 5x + 2.at n=26A023283
• Primes that remain prime through 4 iterations of function f(x) = 5x + 2.at n=4A023313
• Primes that are palindromic in base 12.at n=37A029979
• a(n) = a(n-1) + a(round(2*(n-1)/3)) + a(round((n-1)/3)) with a(1)=a(2)=1.at n=41A033499
• Numbers k such that 31*2^k-1 is prime.at n=26A050541
• Row sums of triangle A104988, which equals the matrix square of triangle A104980.at n=6A104989
• Numbers k such that k, k+1, k+2 and k+3 are 1,2,3,4-almost primes.at n=23A113000
• Numbers such that the sum of the factorials of the digits of the fourth power is a square.at n=37A126077
• Primes that are the average of the members of emirp pairs.at n=24A178581
• Nonpalindromic primes that are the average of the members of emirp pairs.at n=16A178585
• a(n) = A186882(n+1) - A186882(n).at n=16A186883
• Second prime p such that (p+n)^2+n is prime but (p+j)^2+j is not prime for all 0<j<n.at n=39A238674
• Primes p such that pi(p^2)*pi(q^2) is a square for some prime q < p, where pi(x) denotes the number of primes not exceeding x.at n=16A262700
• Terms k of A112998 such that k+2 is nonsquarefree.at n=19A328160
• Primes p such that p^2 + 1 has more divisors than p^2 - 1.at n=13A358879
• Number of integer partitions of n with origin-to-boundary graph-distance equal to 4.at n=67A384562
• Primes having only {2, 5, 6, 7} as digits.at n=33A386160
• Prime numbersat n=2826