1447110

Appears in sequences

• Numbers k such that 2*k-1, 4*k-1, 6*k-1, 8*k-1, 10*k-1 and 12*k-1 are primes.at n=6A124489
• Numbers n such that 2n-1, 4n-1, 6n-1, 8n-1, 10n-1, 12n-1 and 14n-1 are primes.at n=0A124490
• Numbers n such that 2n-1, 4n-1, 6n-1, 8n-1, 10n-1, 12n-1, 14n-1 and 16n-1 are primes.at n=0A124491
• a(n) = least k such that 2*i*k - 1 is prime for 1 <= i <= n.at n=6A124492
• a(n) = least k such that 2*i*k - 1 is prime for 1 <= i <= n.at n=7A124492
• Half the number of nX6 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.at n=7A183307
• Half the number of nX8 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.at n=5A183309