23899

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 5x + 8.at n=31A023286
• Number of symmetrically inequivalent coincidence rotations of icosian ring of index n.at n=99A031366
• Euclid-Mullin sequence (A000945) with initial value a(1)=127 instead of a(1)=2.at n=8A051335
• Primes with digit sum = 31.at n=34A106767
• phi(n) plus the n-th prime gives a square.at n=40A116021
• In this sequence each prime ends a prime century. Place a 0 between the final two digits, and raise the 100s digit by 1, to form the first prime of the next century.at n=2A156083
• Prime p1 of consecutive primes p1, p2, where p2-p1=10, and p1, p2 are in different centuries.at n=24A160500
• Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition.at n=4A160883
• Constant term in the reduction of the polynomial x^(2*n) + x^n + 1 by x^3 -> x + 1. See Comments.at n=21A192812
• Number of partitions of 2^n into three distinct primes.at n=20A214844
• a(1) = 2; a(n + 1) = smallest prime > a(n) such that a(n + 1) - a(n) is the product of 8 primes.at n=22A285693
• Primes in A340180.at n=39A342644
• Primes p such that p + q +- 1 and p^3 + q^3 +- 1 are twin prime pairs, where q = nextprime(p).at n=4A366644
• Prime numbersat n=2659