hard · GMAT Quant
A sequence e_1, e_2, e_3, dots is defined by e_1 = 1, e_2 = 2, and e_n+2 = 2e_n+1 + e_n for all integers n ≥ 1.
How many terms among e_1, e_2, dots, e_105 are divisible by 3?
- 26
- 35
- 27
- 79
- 13
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