64 squares. Each one costs twice the last. That's all.
64 squares. Square 1 cost $1. Square 64 costs $9,223,372,036,854,775,808. Buy one and it's yours forever.
The Doubling Board is a web app featuring 64 squares, where each subsequent square costs double the previous one, starting at $1. Users can purchase a square, which remains theirs indefinitely.
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.