[ExI] 11 numbers that are cooler than pi

[BillK]

Pi may be one of the best-known numbers, but for people who are paid
to think about numbers all day long, the circle constant can be a bit
of a bore. We asked several mathematicians to tell us their favorite
non-pi numbers. Here are some of their answers.

<https://www.livescience.com/64987-numbers-as-cool-as-pi.html>
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Just something for the maths nerds!   :)

BillK