138337

Properties

Appears in sequences

• Primes of the form 2*p^2 - 1, where p is prime.at n=21A092057
• a(n) = 128*n^2 - 32*n + 1.at n=32A157331
• a(n) = 128*n^2 + 2528*n + 12481.at n=22A157436
• Primes of the form 2*p^k-1, where p is prime and k > 1.at n=33A178491
• Prime k with sigma(sigma(sigma(k))) < 3*k + 1.at n=29A320517
• Prime numbersat n=12870