24691

Properties

Appears in sequences

• Crystal ball sequence for A_9 lattice.at n=3A008394
• Smallest prime == 1 (mod f(n)), where f(n) = concatenation 1,2,3,... up to n.at n=4A109947
• Prime numbers p such that p +- ((p-1)/5) are primes.at n=21A137714
• Primes of the form n^2+42.at n=22A174812
• Primes of the form 9n^3-5.at n=3A200963
• Primes p such that (p+2)/3 and (p+3)/2 are prime.at n=45A338410
• Numbers k such that tau(k) + tau(k+1) + tau(k+2) + tau(k+3) = 16, where tau is the number of divisors function A000005.at n=21A350686
• G.f. A(x) satisfies: A(x) = 1 + x + x^2 * A(x/(1 + 5*x)) / (1 + 5*x).at n=8A351186
• Discriminants of imaginary quadratic fields with class number 31 (negated).at n=28A351669
• Number of odd-length integer partitions of n with integer mean.at n=57A361656
• a(n) = A108625(3*n, n).at n=3A363868
• For a line L in the plane, let C(L) denote the number of prime points [k, prime(k)] on L, and let M(L) denote the maximum prime(k) for any of these points; a(n) = minimum M(L) over all lines with C(L) = n, or -1 if there is no such line.at n=29A376187
• Prime numbersat n=2734