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The Pyramid Sequence

The Pyramid Sequence

What numbers are in the next line of the sequence?

Solution

Each row of numbers describes the previous row. For example, since in the first row there is a 1, the description of the second row will be: a one = 11. The third row describes the second row in which there are two numbers one, that is: two ones = 21 and so on to the new row in which we describe the last row that appears in the pyramid, that is: a three, two ones, a three, a one, a two, three ones, a three, a one, two doses and a one or which is the same: 13211311123113112211