5, 4, 6, 15, 56, 285, 1644

  • 56
  • 285
  • 6
  • 15
  • 4
  • Explanation:

    Solution,

    5×1-1=4

    4×2-2=6

    6×3-3=15

    15×4-4=56

    56×5-5=275

    275×6-6=1644

     

     

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5, 4, 6, 15, 56, 285, 1644
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