21767

Properties

Appears in sequences

• Primes p such that (p-1)/2 and (p-3)/4 are also prime.at n=30A066179
• Number of superdiagonal partitions: partitions (p1, p2, p3, ...) of n such that pi >= i.at n=52A238873
• Primes of the form 2*n^2+26*n+11.at n=29A243888
• Primes congruent to 11 mod 111.at n=35A252893
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 585", based on the 5-celled von Neumann neighborhood.at n=28A273075
• Prime time primes (of the form HMMSS with primes H < 24 and MM, SS < 60) such that the corresponding number of seconds after midnight is also prime.at n=11A295000
• Indices i where a run of zeros starts in A305671.at n=27A305673
• a(0) = ... = a(4) = 1; a(n) = Sum_{k=0..n-5} Stirling2(n-5,k) * a(k).at n=14A336022
• Lexicographically earliest infinite sequence of distinct primes such that, for n > 0, 2n | (a(n+1) - a(n)) and, for n > 0, b(n+1) > b(n) where b(n) = (a(n+1) - a(n)) / 2n.at n=23A350392
• Primes p such that p^2 + 1 has more divisors than p^2 - 1.at n=12A358879
• Consecutive states of the linear congruential pseudo-random number generator (1093*s + 18257) mod 86436 when started at s=1.at n=38A385340
• Prime numbersat n=2442