Here’s another T-shirt that I found in my quest for the perfect ugly mathematical Christmas sweater: https://www.amazon.com/Fibonacci-Christmas-Tree-Holiday-Shirt/dp/B07KCF1F6D/
Unlike the shirt in my previous post, this one actually gets the first ten rows of Pascal’s triangle correct. So that’s a good thing.
There’s one small error: while the Fibonacci numbers can be found by adding along shallow diagonals of Pascal’s triangle, this really shouldn’t be called a “Fibonacci Christmas Tree.”
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