538508

Appears in sequences

• Numbers k such that (10^k - 1)/9 + 6 is prime.at n=20A097684
• a(n) is the least integer k such that k/Fibonacci(n) > 2/5.at n=31A293640
• a(n) is the integer k that minimizes |k/Fibonacci(n) - 2/5|.at n=31A293641