211050

Appears in sequences

• Numbers k such that k-1, k+1, 2*k-1, 2*k+1, 4*k-1 and 4*k+1 are all prime.at n=0A069175
• Least number X such that for each k in (0 to n-1), 2^k*X-1 and 2^k*X+1 are primes. That is, there are N twin primes, each the "double" of the previous.at n=2A069179
• Numbers k such that k+1, 2k+1, 3k+1, 4k+1, 5k+1 are five primes.at n=6A237190
• Variation on Fermat's Diophantine m-tuple: 1 + the product of any two distinct terms is a prime power.at n=6A274694
• Numbers k such that k + 1, 2k + 1, 3k + 1, 4k + 1, and 6k + 1 are all prime.at n=7A333721