23893

Properties

Appears in sequences

• Primes p from A031924 such that A052180(p) = 23.at n=19A052238
• Primes which, although they have correct parity, are not in the prime number maze.at n=32A065123
• Balanced primes of order four.at n=26A082079
• Balanced primes (A090403) of index 4.at n=3A096708
• Numbers p such that p = (prime(n)+ prime(n+2))/2 is prime for prime indices n=2, 3, 5...at n=25A098038
• Primes of the form (prime(prime(k)) + prime(prime(k+1)))/2.at n=21A098042
• Primes of the form 256 k + 85.at n=22A127593
• Triangle T(n,k) read by rows: number of permutations in [n] with exactly k ascents that have an even number of inversions.at n=52A128612
• Triangle T(n,k) read by rows: number of permutations in [n] with exactly k ascents that have an odd number of inversions.at n=47A128613
• Primes p such that p-6^3, p-6^2, p-6, p, p+6, p+6^2 and p+6^3 are primes.at n=10A141280
• Triangle read by rows: T(n,k) is the number of even permutations of {1,2,...,n} having k descents (n >= 1, k >= 0).at n=43A145882
• Triangle read by rows: T(n,k) is the number of odd permutations of {1,2,...,n} having k descents. (n>=1, k>=1).at n=39A145883
• Primes p such that the multiplicative order of 2 modulo p is (p-1)/11.at n=7A152311
• Primes p such that 2*p^4-+21 are also prime.at n=35A174367
• Primes that are the sum of three consecutive primes in A034962.at n=37A207527
• Let p_(3,1)(m) be the m-th prime == 1(mod 3). Then a(n) is the smallest p_(3,1)(m) such that the interval(p_(3,1)(m)*n, p_(3,1)(m+1)*n) contains exactly one prime == 1(mod 3).at n=25A210465
• a(1)=1, a(2)=2; thereafter a(n) = a(n-1) + a(n-1-(number of even terms so far)) + a(n-1-(number of odd terms so far)).at n=45A249039
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood.at n=14A279500
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 179", based on the 5-celled von Neumann neighborhood.at n=15A279666
• Numbers k such that 9*10^k + 67 is prime.at n=19A294679