math_fact: 5279 is the number permutations of {1,2,3,...,20} where adjacent numbers differ by no more than 2.
trivia: 5279 is an uninteresting number.
historical_date: June 14th is the day in 1941 that June deportation, the first major wave of Soviet mass deportations and murder of Estonians, Latvians and Lithuanians, begins.