70051

Properties

Appears in sequences

• A partial product representation of f(n) = A015523(n) and L(n) = A072263(n).at n=14A072271
• Largest prime factor of 2^n-3.at n=23A093817
• Numbers k such that 2*10^k + 4*R_k - 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=16A102953
• Primes p such that 2*p^4-+15 are also prime.at n=29A174366
• Primes p of the form p = A161671(k) = A161671(k+1).at n=41A220220
• a(n) = Sum_{k=0..floor(n/3)} binomial(n-k,k) * binomial(n-2*k,k)^2.at n=12A383577
• Prime numbersat n=6941