133157

Properties

Appears in sequences

• a(n) is the minimal prime of the form 4k+1 for which s=A008784(n) is the minimal positive integer such that s*a(n)-floor(sqrt(s*a(n)))^2 is a square.at n=20A145215
• Primes p such that pi(p^2)*pi(q^2) is a square for some prime q < p, where pi(x) denotes the number of primes not exceeding x.at n=21A262700
• Prime numbers whose binary expansion contains only prime powers of 2 and the zeroth power.at n=22A342475
• Prime numbersat n=12428