823421

Properties

Appears in sequences

• Prime numbers P such that Q=2*P^2-1, R=2*Q^2-1, S=2*R^2-1 and T=2*S^2-1 are all prime numbers.at n=2A245659
• a(n) = Sum_{j=1..n*(n-1)} (n*j mod (n+j)).at n=39A309341
• Prime numbersat n=65676