math_fact: 4006 is _{14}C_{4} + _{14}C_{0} + _{14}C_{0} + _{14}C_{6}.
trivia: 4006 is an uninteresting number.
historical_date: December 19th is the day in 1776 that Thomas Paine publishes one of a series of pamphlets in the Pennsylvania Journal titled The American Crisis.