24 team, 168 game schedule
2 leagues, 3 divisions per league, 4 teams per division
52 games in the division (16 or 18 per opponent)
56 games outside division, but still inside league (7 per opponent)
60 interleague games (5 per opponent)
This schedule is just the same as
this 162 game schedule, except with an extra pair of 3-game intradivisional series tacked onto the beginning of the schedule thus bumping everything else back one week.
See the comments at the top of the file for a few more details.