Any positive integer up to 2ⁿ-1 inclusive can be expressed uniquely as a binary decimal of n figures, i.e., as a sum ∑₀ⁿ⁻¹a_s2ˢ, where every a_s is 0 or 1.

2004, Bruce Driver, Clare Wharton, The Baffled Parent's Guide to Coaching Youth Hockey, page 81: A smart defensive player knows when to backcheck the puck carrier and when to backcheck to cover an open player. Hockey has no greater test of your heart and intensity than your willingness to backcheck, particularly at the end of a sustained attack when the other team has suddenly come up with the puck and you are feeling exhausted.

Country harness costs nearly as much, lasts half the time, and is in every respect inferior. It is understood that the only reason is that the Court desires to improve and encourage Indian manufactures.

Despite his continued commitment to social issues, Weber claims, "I've never been involved in didactic art, agitational art.