Fatto matematico: 8178 is the number of ways 13 people can line up so that only one person has a taller person in front of him.
Trivia: 8178 is an unremarkable number.
Data storica: May 22nd is the day in 1816 that a mob in Littleport, Cambridgeshire, England, riots over high unemployment and rising grain costs; the rioting spreads to Ely the next day.