138937

Properties

Appears in sequences

• Wagstaff numbers: numbers k such that (2^k + 1)/3 is prime.at n=34A000978
• Indices of prime Jacobsthal numbers.at n=35A107036
• Primes of the form 15x^3+x+1.at n=5A114357
• Numbers n such that (2^n+1)/3 is prime and can be written in the form a^2 + 3*b^2.at n=14A216550
• Primes of form n^2 + 1296.at n=36A256834
• Numbers k such that (2^k + 1)/(2 - (-1)^k) is a prime.at n=39A280083
• Wagstaff numbers that are of the form 4*k + 1.at n=12A361563
• Prime numbersat n=12923