169957

Properties

Appears in sequences

• a(n) = N(5,n), where N(5,x) is the 5th Narayana polynomial.at n=18A090198
• Primes of the form (p^2 - p*q + q^2)/3, where p and q are consecutive primes.at n=19A342706
• a(n) is the smallest prime k such that (prime(n), k, u, v) are the vertices of a square in Ulam's spiral, where k < u < v are all primes; or -1 if there is no such k.at n=38A383595
• Prime numbersat n=15495