34205

Appears in sequences

• Numbers k such that (phi(k-2) + phi(k+2))/2 = phi(k); 2-phi/balanced numbers.at n=27A099633
• a(n) = floor(1/(zeta(4) - Sum_{h=1..n} 1/h^4)).at n=21A248230
• Numbers k = concat(s,t) such that k = (Fibonacci(s) mod k) * (Fibonacci(t) mod k).at n=5A272770