Delving Deeper: Close Encounters with Stirling Numbers of the Second Kind
Edited by Maurice Burke, J. Kevin Colligan, Maria Fung, and Jeffrey J. Wanko
November 2012, Volume 106, Issue 4, Page 313
Two seemingly unrelated problems—one posed to a class of eighth graders, the other posed to a class of high school juniors—uncover a connection through Stirling numbers of the second kind.
Permutations / Combinations / Counting Problems
Problem Solving / Problem Posing