22937

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 69.at n=22A020408
• Primes with 4 distinct digits that remain prime (no leading zeros allowed) after deleting all occurrences of its digits d.at n=7A057880
• Prime(n) and prime(n+4) use the same digits.at n=22A069796
• Indices of primes in sequence defined by A(0) = 57, A(n) = 10*A(n-1) - 23 for n > 0.at n=17A101580
• a(n) = 1 + 2 * least i such that A103507(i)=n+1, 0 if no such i exists.at n=33A103508
• Primes from merging of 5 successive digits in decimal expansion of Zeta(2) or (Pi^2)/6.at n=8A105378
• One seventh of the sum of the first n primes, when an integer.at n=35A112272
• Numbers with d digits (d>0) which have at least 2d distinct primes as substrings.at n=18A168167
• Primes with nine embedded primes.at n=6A179917
• Central terms of the triangle in A199333: a(n) = A199333(2*n,n).at n=8A199581
• Central terms of the triangle in A199333: a(n) = A199333(n,[n/2]).at n=16A199582
• Primes p such that p^4 + p + 1 and p^4 - p - 1 are also prime.at n=19A236073
• a(1) = 5; a(n) for n > 1 is the smallest prime > a(n-1) that differs from a(n-1) by a square.at n=53A246760
• Primes p such that phi(p-2) = phi(p-1).at n=9A256510
• Primes p such that phi(phi(p-1)+1) = phi(phi(p-2)+1).at n=19A271659
• Primes p such that phi(phi(p-2)-1) = phi(phi(p-1)-1).at n=12A271660
• Primes that can be generated by the concatenation in base 3, in ascending order, of two consecutive integers read in base 10.at n=29A287300
• Sum of the squarefree parts of the partitions of n into 7 parts.at n=33A309482
• Prime numbersat n=2559