An unusual problem by Reddit user cgibbard, from a discussion in 2010:
Here’s a representation of 101010 for you to figure out.
* * * | | | * * * * * * * * * | | \ / \ / \|/ * * * * * *As a bonus, here’s the corresponding representation for 42:
* * * | \ / * * *The puzzle is to find the rule for this representation.
A commenter wrote, “This puzzle is really clever and very rewarding to figure out.”