Fatto matematico: 8340 is a value of n so that (n-1)^{2} + n^{2} + (n+1)^{2} is a palindrome.
Trivia: 8340 is an uninteresting number.
Data storica: October 31st is the day in 1963 that an explosion at the Indiana State Fair Coliseum (now Pepsi Coliseum) in Indianapolis kills 74 people during an ice skating show.