23321

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 55.at n=31A020394
• Primes p such that p, p+6, p+12, p+18 are all primes.at n=37A023271
• a(n) = prime(100*n).at n=25A031921
• Initial prime in set of 4 consecutive primes with common difference 6.at n=15A033451
• Denominators of continued fraction convergents to sqrt(59).at n=9A041103
• First term of balanced prime quartets: p(m+1)-p(m) = p(m+2)-p(m+1) = p(m+3)-p(m+2).at n=15A054800
• Primes p such that p+7 == 0 (mod phi(p+7)).at n=28A067606
• Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k.at n=8A090834
• Balanced primes of order ten.at n=11A096702
• Prime numbers p such that primepi(p) + p is a square.at n=18A104269
• Numerators of partial sums for a series for Pi/(3*sqrt(3)).at n=13A128500
• Numerators of partial sums for a series for Pi/(3*sqrt(3)).at n=14A128500
• Father primes of order 11.at n=22A136080
• a(2n) = a(n), a(2n+1) = 10*a(n) + a(n+1).at n=54A178243
• Primes of the form 2*n^3 + 4*n^2 + 4*n + 1.at n=11A195117
• Primes of the form 4*n^3-7.at n=3A200733
• Primes of the form 2n^2 - 7.at n=31A201714
• Primes of the form 8n^2 - 7.at n=12A201858
• Number of 5-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero.at n=9A208599
• Primes formed by concatenating palindromes having even number of digits with 1.at n=9A210534