199261

Properties

Appears in sequences

• a(n) = (3^(n+1) - 2n^2 + 4n + 5) / 8.at n=12A262592
• a(n) is the least prime p such that (p^2-2*n)/(2*n-1) and (p^2+2*n)/(2*n+1) are both prime, or 0 if such p does not exist.at n=20A344463
• Prime numbersat n=17923