What is the equation for predicting the middle number in Pascal's triangle?

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Discussion Overview

The discussion revolves around finding an equation to predict the middle number in Pascal's triangle, specifically focusing on rows with an odd number of elements. Participants explore examples and seek clarification on the definition of the "middle number."

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks an equation for the middle number in Pascal's triangle, providing row 6 as an example.
  • Another participant requests explicit examples of what is meant by "middle number."
  • Some participants mention the formula for elements in Pascal's triangle, \(\frac{n!}{k!(n-k)!}\), as a potential starting point for understanding the middle number.
  • Several participants list specific middle numbers from various rows of Pascal's triangle, such as 2, 6, 20, 70, and 252.
  • Links to external resources, such as Wolfram Alpha and OEIS, are shared for further exploration of Pascal's triangle values.

Areas of Agreement / Disagreement

Participants express a common interest in identifying the middle number, but there is no consensus on a specific equation or method to predict it. Multiple viewpoints and approaches are presented without resolution.

Contextual Notes

Some assumptions about the definition of "middle number" and the conditions under which the equation applies remain unclear. The discussion does not resolve the mathematical steps needed to derive a specific formula.

gnome222
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I am trying to find the equation to predict the next middle number in pascal's triangle. By middle number I mean in each row that has odd number of numbers the middle number of that row. So for example row 6 which has 1,6,15,20( middle number), 15,6,1. I am trying to find that middle number, but without any luck. Any suggestions?
 
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gnome222 said:
I am trying to find the equation to predict the next middle number in pascal's triangle. By middle number I mean in each row that has odd number of numbers the middle number of that row. So for example row 6 which has 1,6,15,20( middle number), 15,6,1. I am trying to find that middle number, but without any luck. Any suggestions?
Look at the row immediately preceding, that is row 5. Do you notice anything special relating the numbers in row 5 to the numbers in row 6? The first and last number in each row is, of course, 1.
 
You know that the number in Pascal's triangle, row n, place k (k=0 to n), is given by [itex]\frac{n!}{k!(n-k)!}[/itex]?
 
gnome222 said:
numbers 2, 6, 20, 70, 252
And then: 924, 3432, 1287, 48620, 184756, 705432
 

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