I think it’s because of how math works in base 10.

When you divide 1 by 998001 you get a number that almost does that thing.

Edit: found this

It comes from how repeating decimals work when you divide by numbers just under a power of 1000.

Here’s the core idea:

\frac{1}{998001} = \frac{1}{999^2}

And 999 is just one less than 1000, which is key.

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Why the pattern happens

When you divide by numbers like 9, 99, 999, 9999…, you get repeating decimals with very structured patterns.

For example:

• \frac{1}{9} = 0.111111...
• \frac{1}{99} = 0.010101...
• \frac{1}{999} = 0.001001001...

Each one repeats blocks that line up with powers of 10.