37957

Properties

Appears in sequences

• Numbers k such that 3*10^k + 7*R_k - 6 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A102976
• Prime numbers p such that 10^(j-1) < p < 10^j and p + 10^(j+k) are also prime numbers for k = 0 to 4.at n=0A224906
• Lucky primes k such that k+6 is also a lucky prime.at n=38A309381
• Irregular triangle T read by rows: T(n, k) is the number of n-th order magic triangles with magic constant equal to A285009(n) + k, with 0 < k <= 3*n - 5.at n=42A342384
• Irregular triangle T read by rows: T(n, k) is the number of n-th order magic triangles with magic constant equal to A285009(n) + k, with 0 < k <= 3*n - 5.at n=43A342384
• Primes p such that p^2 + 1 has more divisors than p^2 - 1.at n=27A358879
• Prime numbersat n=4011