23747

Properties

Appears in sequences

• Numbers whose base-5 representation contains exactly three 2's and three 4's.at n=23A045292
• Primes arising in A085042: a(n) = the n-th partial sum of A085042.at n=33A085043
• Primes p such that p-3 and p+3 are divisible by a cube.at n=22A089201
• Indices of prime Pell numbers.at n=26A096650
• Number of fusenes with 24 hexagons, C_(2v) symmetry and containing n carbon atoms.at n=14A123606
• Primes p2 such that p1^2 + p2^3 is an average of twin primes and p1 < p2 are consecutive primes.at n=24A138716
• Position where 10^n-1 occurs in the Kaprekar sequence A006886.at n=40A193992
• Numbers k such that (11^k - 2^k)/9 is prime.at n=7A210506
• Smallest of four consecutive primes in arithmetic progression with common difference 42 and all digit sums prime.at n=18A277607
• 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=28A295000
• Yarborough primes that remain Yarborough primes when each of their digits are replaced by their cubes.at n=36A296563
• Primes p such that p+6, p-6, 2*p+3 and 2*p-3 are prime.at n=25A356079
• Primes p, not safe primes, such that the smallest factor of (2^(p-1)-1) / 3 is equal to p.at n=29A360827
• Smallest prime p such that the multiplicative order of 9 modulo p is 2*n, or 0 if no such prime exists.at n=30A372799
• a(n) is the numerator of the expected number of random moves of a chess king to reach a position outside an nXn chessboard, starting in one of the corners.at n=4A376609
• Prime numbersat n=2641