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3, 5, 13, 43, 177, ?, 5353
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Find the missing number in the sequence : 3, 5, 13, 43, 177, ?, 5353

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The missing number is 891. The logic is
3 * 1 + 2 = 5
5 * 2 + 3 = 13
13 * 3 + 4= 43
43 * 4 + 5 = 177
177 * 5 + 6 = 891
891 * 6 + 7 = 5353

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