24091

Properties

Appears in sequences

• Primes p such that p, p+6, p+12, p+18 are all primes.at n=38A023271
• Primes p whose period of reciprocal equals (p-1)/11.at n=9A056216
• Prime(n) and prime(n+4) use the same digits.at n=23A069796
• Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern = [6, 6, 4]; short d-string notation of pattern = [664].at n=17A078858
• Primes p such that the differences between the 5 consecutive primes starting with p are (6,6,4,2).at n=3A078966
• Duplicate of A056216.at n=9A098678
• Prime numbers p such that p +- ((p-1)/5) are primes.at n=20A137714
• Primes of the form x^2 + 7*y^2, where x and y=x+1 are consecutive natural numbers.at n=28A176616
• Primes that are the sum of 51 consecutive primes.at n=16A215992
• Number of ways 1/n can be expressed as the sum of four distinct unit fractions: 1/n = 1/w + 1/x + 1/y + 1/z satisfying 0 < w < x < y < z.at n=25A241883
• Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 filled by rows with each element moved a city block distance of 0 or 2, and rows and columns in increasing lexicographic order.at n=3A263599
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 filled by rows with each element moved a city block distance of 0 or 2, and rows and columns in increasing lexicographic order.at n=13A263602
• Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 filled by rows with each element moved a city block distance of 0 or 2, and rows and columns in increasing lexicographic order.at n=1A263606
• Smallest primes of 3 X 3 semimagic squares formed from consecutive primes.at n=1A265139
• Least number x such that x^n has n digits equal to k. Case k = 1.at n=23A285448
• Primes equal to a hexagonal number plus 1.at n=29A285790
• Primes p such that (p^128 + 1)/2 is prime.at n=16A341230
• Primes p whose reverse q is a semiprime, and of p+q and its reverse one is a prime and the other is a semiprime.at n=25A350781
• Number of integers in range A002110(n) .. A002110(1+n)-1 such that the maximal digit in their primorial base expansion is not larger than the maximal exponent in their prime factorization, where A002110(n) gives the n-th primorial.at n=6A351069
• Prime numbersat n=2680