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Another number pattern

  1. Jun 8, 2005 #1
    0
    24
    210
    720
    1716
    3360
    5814
    9240
    13800
    19656

    what's the next number
     
  2. jcsd
  3. Jun 9, 2005 #2
    He-he. It's 26970
     
  4. Jun 9, 2005 #3
    a = (3n - 1) * (3n) * (3n + 1), starting with n = 0
     
    Last edited: Jun 9, 2005
  5. Jun 10, 2005 #4
    yeah youre right
    there are actually a formula into it, i never realize that
    -1 0 1
    2 3 4
    5 6 7
    8 9 10
    11 12 13
    14 15 16
    17 18 19
    20 21 22
    23 24 25

    this is how i did it and i multiply them each row
    and result in this

    -1 0 1 0
    2 3 4 24
    5 6 7 210
    8 9 10 720
    11 12 13 1716
    14 15 16 3360
    17 18 19 5814
    20 21 22 9240
    23 24 25 13800
    26 27 28 19656

    where the fourth coloumn is equal to the multipication of all the number in the row.
     
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