232829

Appears in sequences

• Concatenate prevprime(n), n, and nextprime(n).at n=25A049857
• Dirichlet g.f.: zeta(s-3)^2 * (1 - 2^(4-s)) / zeta(s).at n=38A369101
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, x_2, x_3, n)^3.at n=38A372928