23021

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 2x + 9.at n=40A023276
• Primes that remain prime through 4 iterations of function f(x) = 2x + 9.at n=16A023306
• Primes that remain prime through 5 iterations of function f(x) = 2x + 9.at n=3A023334
• Multiplicity of highest weight (or singular) vectors associated with character chi_29 of Monster module.at n=40A034417
• Sixth term of strong prime sextets: p(m-4)-p(m-5) > p(m-3)-p(m-4) > p(m-2)-p(m-3) > p(m-1)-p(m-2) > p(m)-p(m-1).at n=5A054818
• A064637 converted to factorial base.at n=27A064477
• Primes such that prime(p) +- pi(p) are simultaneously prime.at n=36A065117
• Primes p2 such that p1^2 + p2^3 is an average of twin primes and p1 < p2 are consecutive primes.at n=22A138716
• Incorrect duplicate of A062343.at n=32A176254
• Number of (n+1) X (n+1) -2..2 symmetric matrices with every 2 X 2 subblock having sum zero and one or three distinct values.at n=11A211114
• Primes p with property that there exists a number d>0 such that numbers p-k*d, k=1...7, are seven primes.at n=30A216590
• a(n+1) is the smallest prime > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(1)=2.at n=13A242904
• Odd primes p for which there are exactly as many primes in the range [prevprime(p)^2, prevprime(p)*p] as there are in the range [prevprime(p)*p, p^2], where prevprime(p) gives the previous prime before prime p.at n=30A256473
• Positions of records in permutation A267107.at n=15A268393
• a(0) = 1, a(1) = 2; for k>0, a(2*k) = k*a(2*k-1) + a(2*k-2), a(2*k+1) = a(2*k) + a(2*k-1).at n=12A273939
• Primes p such that the sum of the cubes of digits of p equals the sum of digits of p^3.at n=9A291052
• Primes which, when added to their reversals, produce palindromic primes.at n=26A342681
• Prime numbersat n=2568