205000

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 2, 4 and 5.at n=47A136897
• Numbers n such that phi(n)/n = 16/41.at n=29A176598
• a(n) = ((10-sqrt(10))^n + (10+sqrt(10))^n) / 2.at n=5A289414