A sequence is defined by a_1 = 3 and a_n = 2 * a_(n-1) - 1 for n > 1. What is the value of a_4?

✓ Correct Answer: Option C

Given a_1 = 3. Calculate subsequent terms: a_2 = 2*a_1 - 1 = 2*3 - 1 = 5. a_3 = 2*a_2 - 1 = 2*5 - 1 = 9. a_4 = 2*a_3 - 1 = 2*9 - 1 = 17.