51437

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 23.at n=13A031611
• a(1) = 2; a(n) is smallest prime > 2*a(n-1).at n=14A055496
• Numerator of Sum(k^mu(k): 1<=k<=n), where mu is the Moebius function (A008683).at n=11A080306
• Primes in A126554.at n=13A126555
• Penta-Primes. Prime Numbers n as a Sum of 5 consecutive prime numbers (four twin primes and single prime number in between) are primes.at n=14A138397
• First differences of A080735.at n=83A163963
• Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3Xn array.at n=11A220155
• Primes p such that 2*prime(p) + 1 = prime(q) for some prime q.at n=46A261361
• Numbers that divide exactly two Euclid numbers.at n=38A297891
• Prime numbersat n=5263