math_fact: 2913 is a value of n for which s(n-1) + s(n+1) = s(2n).
trivia: 2913 is an uninteresting number.
historical_date: December 22nd is the day in 1807 that the Embargo Act, forbidding trade with all foreign countries, is passed by the U.S. Congress, at the urging of President Thomas Jefferson.