250501

Properties

Appears in sequences

• 6 consecutive primes differ by 2n or more starting at a(n).at n=9A054689
• 6 consecutive primes differ by 2n or more starting at a(n).at n=10A054689
• 6 consecutive primes differ by 2n or more starting at a(n).at n=11A054689
• 4 consecutive primes differ by 2n or more starting at a(n).at n=15A054698
• 4 consecutive primes differ by 2n or more starting at a(n).at n=16A054698
• 4 consecutive primes differ by 2n or more starting at a(n).at n=17A054698
• 5 consecutive primes differ by 2n or more starting at a(n).at n=11A054699
• The first primes in centuries with three primes.at n=16A157131
• Consecutive Pythagorean primes p = A002144(r) and q = A002144(r+1) such that q - p > log(p)^2. The number a(n) is the n-th value of p.at n=14A216924
• a(n) = Sum_{i=0..(n+1)/2} binomial(2*i+1,i)*binomial(2*n-2*i,n)/(2*i+1).at n=10A270490
• Primes of the form b^2*10^(2*k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.at n=10A309738
• Prime numbersat n=22078