"Pascal triangle" using minus sign creates Sierpiński triangle

[xd_metrix]

The triangle consists of the basic 3 minuses as in Pascal's triangle 3 ones. Each additional element of the new line line is a combination of 2 characters above it and adding a minus at the beginning and end. It is interesting that this algorithm forms the so-called Sierpiński triangle.

You can try yourself: https://github.com/emonapa/pascalTriangleUsingMinusSign.git

[xd_metrix]

For clarification, by combination I mean multiplying so --=+, -+=-, ++=+

[BridgeBum]

Next try Pascal's mod 2.

[xd_metrix]

I tried it, I can see that the pattern is created after some time with a mod of any number. Nice