28723

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 5x + 2.at n=27A023283
• Primes p from A031924 such that A052180(p) = 23.at n=22A052238
• Numbers k such that 2^k - 15 is prime.at n=27A059612
• Primes which are the sum of three positive 4th powers.at n=38A085318
• Primes whose digit reversal is a pentagonal number (A000326).at n=15A115706
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, -1), (0, 0, 1), (1, 0, 0)}.at n=10A149814
• Primes of the form 2*n^2 + 82*n + 39.at n=13A217620
• Primes p of the form p = A161671(k) = A161671(k+1).at n=28A220220
• a(n) is the smallest prime p = prime(k) such that A300845(k) = prime(n), or 0 if no such k exists.at n=48A300854
• Primes p not of the form k^2+s where k > 1 and 1 <= s < (k+1)^2, such that q = k^4+s is prime.at n=35A302485
• Prime numbersat n=3129