3008423

Appears in sequences

• Positive integers k such that k divides 12^k - 1.at n=23A014951
• Numbers k such that k | 10^k + 1.at n=33A015958
• Numbers n dividing u(n), where the Lucas sequence is defined u(i) = u(i-1) - 3*u(i-2) with initial conditions u(0)=0, u(1)=1.at n=26A228440
• Numbers k such that sigma_2(k) = sigma_2(phi(k)).at n=6A333338