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Answer:
Explanation:
I'd use the explicit formula. The recursive one is going to be too large.
L(13) = a*4^(n - 1)
L(13) = 3 * 4^(13 - 1)
L(13) = 3 * 4^(12)
L(13) = 3 * 16777216
L(13) = 50331648
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