267300

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 94.at n=10A031772
• Numbers k such that 4*k-1, 8*k-1, 16*k-1, 32*k-1, 64*k-1 and 128*k-1 are all primes.at n=2A101320
• Numbers k such that 4*k-1, 8*k-1, 16*k-1, 32*k-1 and 64*k-1 are all primes.at n=10A101994
• Largest k such that k <= 81*(number of digits of k^n)*(number of digits of k^(n+1)).at n=9A130179
• a(n) = Product_{d|n, d<n} A019565(phi(d)), where phi is the Euler totient function A000010.at n=53A318834