What a reward! Giving the money you earned to someone else.

> Because of the high cost of sending international money orders (etc.)

I have just the solution for that!

Plus, his reward amounts are well within the usual tolerances of Lightning / SN usage

SimpleStacker

Solving one of these and actually getting your name published :D

LightOfBitcoin

Stated below are a few challenging problems. If you are first to publish a solution in a refereed journal, let me know, and collect your reward! Or, if you find a short solution and you are 

 it is correct and complete, send it to 

. If accepted, your proof will be published on this site - see, for example, Problem 8. Note (added January 15, 2025): Because of the high cost of sending international money orders (etc.), payments for solutions after January 1, 2025 will be as of donations that Clark Kimberling will make in your name to 

math

> Stated below are a few challenging problems. If you are first to publish a solution in a refereed journal, let me know, and collect your reward! Or, if you find a short solution and you are *quite sure* it is correct and complete, send it to ck6@evansville.edu. If accepted, your proof will be published on this site - see, for example, Problem 8. Note (added January 15, 2025): Because of the high cost of sending international money orders (etc.), payments for solutions after January 1, 2025 will be as of donations that Clark Kimberling will make in your name to [Online Encyclopedia of Integer Sequences: Donations](https://oeisf.org/donate)
>
> [**...read more at faculty.evansville.edu**](https://faculty.evansville.edu/ck6/integer/unsolved.html)