please empty your brain below

For example:

If I start with 11...

Double 11 is 22
Subtract 1 is 21
Reverse the digits is 12

...which is close, but not correct.

1, if single digits are allowed.

Otherwise it's 37.

Correct, 1 and 37 both work.

Now, anyone for an answer over 100?

Am I the only one playing? Looks like it - 397.

Yup.
And then the next one after that?
(There is a pattern, honest)

3997?

Then 39997?

Yup. Yup.
Anyone care to give us infinitely many answers?

Nope. Fed up now.











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