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location $\:\def\s{\space}\color{red}{\rlap{\color{\green}{\s\s\!\!\tiny\star}}{\Rule{1em}{0.5em}{0.25em}}}$
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seen Dec 15 at 20:32

Contact: partyman10@ymail.com

We're watching you $\require{action}\mathtip{{\Large \triangle}^{\hspace{-9.9pt}{{\bigcirc\hspace{-6.85pt}\odot}}}}{\text{Credits: Alexander Gruber}}$



Pythagorean tree:

For each natural number $n$, we draw a periodic curve starting from the origin, intersecting the $x$-axis at $n$ and its multiples. The prime numbers are those that have been intersected by only two curves: the prime number itself and one.

Below the currently highlighted number, we also show its sum of divisors $σ(n)$, and its aliquot sum $s(n) = σ(n) - n$, which indicate whether the number is prime, deficient, perfect or abundant.

How to make dragon curve:

Ulam Spiral: all numbers from 1 to 100000; the more divisors a number has, the larger is the dot.

Comparison between 5,000 and 50,000 prime numbers plotted in polar coordinates

$\varphi$ curve:

LaTeX + Image: $\style{ display: inline-block; background: url(//i.stack.imgur.com/C8nN0.png?s=128&g=1) no-repeat center;}{\phantom{\Rule{128px}{128px}{0px}}}$


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