39983

Properties

Appears in sequences

• Primes expressible as the sum of 3 consecutive palindromic primes.at n=15A046493
• Numbers n such that 69*2^n-1 is prime.at n=49A050560
• Safe primes (A005385) (p and (p-1)/2 are primes) such that 12*p+1 is also prime.at n=68A075707
• Primes of the form 8*k-1 such that 4*k-1 and 16*k-1 are also primes.at n=30A101792
• Primes that do not divide any term of the Lucas 4-step sequence A073817.at n=34A106300
• Poincaré series [or Poincare series] P(C^o_{3,2}; x).at n=15A124633
• Larger of pairs of emirps (A006567) whose difference with the (smaller) reversal is a triangular number (A000217).at n=36A217286
• a(n) is the largest number that can be expressed as the sum of three triangular numbers in exactly n ways.at n=21A330810
• a(n) is the largest number that can be expressed as the sum of three positive triangular numbers in exactly n ways.at n=22A330811
• Primes having only {3, 8, 9} as digits.at n=31A385792
• Prime numbersat n=4202