Difference between revisions of "Bill's Triangle"
| Line 11: | Line 11: | ||
<cmath>0, 0, 0, 0, 0, 0</cmath> | <cmath>0, 0, 0, 0, 0, 0</cmath> | ||
| − | <cmath>0, 0, 0, | + | <cmath>0, 0, 0, 1, 0, 0, 0</cmath> |
| − | Now, we can add the top three numbers to get the next number. | + | Now, we can add the top three numbers to get the next number. The boxed numbers are the ones we add to get the next row. |
| − | <cmath>0, 0, 0, 0, 0, 0 | + | <cmath>0, 0, \boxed{0}, \boxed{0}, 0, 0</cmath> |
| − | + | <cmath>0, 0, 0, \boxed{1}, 0, 0, 0</cmath> | |
| − | <cmath>0, 0, 0, | ||
Revision as of 13:53, 6 August 2017
Bill's Triangle is a triangle similar to Pascal's Triangle, except each number is obtained by adding the top three numbers, not just the top two. It was found by Bill9000. (If anyone finds someone who found this triangle before, please tell Bill9000.)
How to Make Bill's Triangle
As with Pascal's Triangle, we start with a complete row of zeros. However, in Bill's Triangle, we need another row:
![\[0, 0, 0, 0, 0, 0\]](http://latex.artofproblemsolving.com/3/2/f/32f4a5018e734c307e880b431b7e52e49f317ab0.png)
![\[0, 0, 0, 0, 0, 0, 0\]](http://latex.artofproblemsolving.com/2/b/0/2b0c5970555ab37c04b266e91ea0b83fe45f9777.png)
Again, as with Pascal's Triangle, we change a zero to a one:
![\[0, 0, 0, 1, 0, 0, 0\]](http://latex.artofproblemsolving.com/b/7/3/b734ef508564c4fdae9fd6181dab51672c5f0fa6.png)
Now, we can add the top three numbers to get the next number. The boxed numbers are the ones we add to get the next row.
![\[0, 0, \boxed{0}, \boxed{0}, 0, 0\]](http://latex.artofproblemsolving.com/5/6/3/563170a343383aaf4b71e47b9001096439bf6199.png)
![\[0, 0, 0, \boxed{1}, 0, 0, 0\]](http://latex.artofproblemsolving.com/f/0/7/f07d35a05dc4ccd9be963cf53c63dbc7b6341b92.png)
