53189

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 27.at n=8A031615
• Least prime in A031926 (lesser of 8-twins) whose distance to the next 8-twin is 6*n.at n=35A052353
• Primes p such that |100-p|, |1000-p|, |10000-p| and |100000-p| are also primes.at n=35A126021
• Primes of the form a^a + b^b + c^c + d^d + e^e.at n=31A136292
• Primes p of the form A152539(n) + 1.at n=37A152540
• Antidiagonal sums of the convolution array A213590.at n=12A213557
• a(n) = 7^(floor(n/3))*A(n), where A(n) = A(n-1) + A(n-2) + A(n-3)/7, with A(0)=3, A(1)=1, A(2)=3.at n=10A215828
• Primes p such that 100p-1, 100p-3, 100p-7, and 100p-9 are all prime.at n=8A243409
• Prime numbersat n=5427