math_fact: 246 is _{9}C_{2} + _{9}C_{4} + _{9}C_{6}.
trivia: 246 is an uninteresting number.
historical_date: September 2nd is the day in 1963 that CBS Evening News becomes U.S. network television's first half-hour weeknight news broadcast, when the show is lengthened from 15 to 30 minutes.