25343

Properties

Appears in sequences

• Arrays of dumbbells.at n=14A002940
• Primes that remain prime through 3 iterations of function f(x) = 5x + 4.at n=34A023284
• Group the natural numbers such that the n-th group contains n terms and the group sum is the smallest possible prime: (2), (1, 4), (3, 5, 9), (6, 7, 8, 10), (11, 12, 13, 14, 17), (15, 16, 18, 19, 20, 21), ... Sequence gives group sums.at n=36A075345
• Prime numbers occurring at integer Pythagorean distance (radius) from 1 in Ulam square prime-spiral. Primes on axes are excluded.at n=35A078765
• Primes of the form p = prime(k+1) such that prime(k) = (prime(k+3)+prime(k-1))/2.at n=23A126239
• Primes p such that (p-7)/8 and 8p + 7 are both prime.at n=27A158238
• a(n) = 44*n^2 - 1.at n=23A158628
• Row sums of the triangle in A162371.at n=36A162373
• Supersafe primes.at n=41A181841
• Number of nondecreasing strings of numbers x(i=1..6) in -n..n with sum x(i)^3 equal to 0.at n=43A188280
• Primes of the form 6n^2 - 7.at n=24A201792
• a(n) = (A230624(n)-2)/4.at n=50A350607
• Primes having only {2, 3, 4, 5} as digits.at n=39A386139
• Prime numbersat n=2795