24181

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 99.at n=19A020438
• Primes that remain prime through 3 iterations of function f(x) = 3x + 8.at n=18A023279
• Numbers whose base-7 representation contains exactly four 3's.at n=33A043408
• Primes with 17 as smallest positive primitive root.at n=24A061329
• Primes of the form 4*k^2 - 10*k + 7 with k positive.at n=27A073337
• Diagonal sums of the number triangle A098505.at n=26A098507
• Tribonacci analog of A055502.at n=16A113823
• Primes of the form 11x^3+x+1.at n=6A114355
• Number of nodes (or order) of a graph model obtained using an automata scheme on sets of order prime(n) >= 5 and in which all not halt states are linked by arcs (edges).at n=34A160772
• Primes p such that there are positive integers m and n and a prime q such that p = m^2+m-q = n^2+n+q.at n=26A162652
• Primes of the form ((p-1)/2)^2+((p+1)/2), where p is prime.at n=27A163418
• a(n) = a(n-2)*2 + floor(sqrt(a(n-1))).at n=27A182559
• Primes of the form n^2 + n + 1 where n is nonprime.at n=35A185632
• Primes of the form n^2 + n + 1, where n is semiprime.at n=14A193144
• Numbers for which the cube of the sum of the digits is equal to the square of the product of their digits.at n=35A241846
• Initial primes of sets of 8 consecutive primes all different by modulo 30.at n=45A248199
• Least integer k such that the n-th prime of form m^2+1 divides the composite number k^2+1.at n=28A255675
• Primes in A259184.at n=40A259186
• Twin prime pairs of the form (k^2 + k - 1, k^2 + k + 1).at n=43A265006
• a(n) is the smallest prime p such that there is a multiplicative subgroup H of Z/pZ, of odd size and of index 2n, such that for any two cosets H1 and H2 of H, H1 + H2 contains all of (Z/pZ)\0.at n=29A282001