22739

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 8x + 7.at n=10A023294
• Euclid-Mullin sequence (A000945) with initial value a(1)=89 instead of a(1)=2.at n=17A051328
• Numbers k such that prime(k) + prime(k+1) + prime(k+2) is a square.at n=26A076305
• Balanced primes of order four.at n=24A082079
• Indices of primes in sequence defined by A(0) = 37, A(n) = 10*A(n-1) - 3 for n > 0.at n=11A101840
• Primes p such that the largest prime factor of p^5 + 1 is less than p.at n=7A102327
• Primes p such that |100-p|, |1000-p|, |10000-p| and |100000-p| are also primes.at n=25A126021
• Primes of the form a^2 + b^2 + c^2 such that a^4 + b^4 + c^4 is prime as well and larger than the first one.at n=39A126118
• Primes of the form 7n^2 - 4.at n=6A201850
• Number of n-bead necklaces labeled with numbers -3..3 allowing reversal, with sum zero with no three beads in a row equal.at n=7A209339
• T(n,k) is the number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero with no three beads in a row equal.at n=52A209344
• Primes p such that floor(log(p)) + p^2 is prime.at n=19A225626
• Number of length 3 0..n arrays with each partial sum starting from the beginning no more than two standard deviations from its mean.at n=27A244834
• Lesser of twin prime pairs of the form (40n - 21, 40n - 19).at n=33A250025
• a(n) = n^2 + 2329*n + 1697.at n=9A301985
• Numbers k such that k![4] - 256 is prime, where k![4] = A007662(k) = quadruple factorial.at n=37A329177
• Primes whose position in the Wythoff array is immediately followed by a prime both in the next column and the next row.at n=13A352537
• a(n) = p(n^2*p(n)), where p(x) is the least prime > x.at n=28A378137
• a(n) is the number of ways to partition an n X n X n cube into 4 noncongruent cuboids.at n=28A384311
• a(n) is the number of ways to partition an n X n X n cube into four noncongruent cuboids of different volumes.at n=28A385580