6 , 21, 116, ?, 4674, 33593
( 6 + 1³) × 3 = 21 ( 21 + 2³) × 4 = 116 ( 116 + 3³) × 5 = 715 ( 715 + 4³) × 6 = 4674 (4674 + 5³) × 7 = 33593
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