20 team, 154 game schedule
2 leagues, 2 divisions per league, 5 teams per division
84 games in the division (21 per opponent)
70 games outside division (14 per opponent)
no interleague games
See the comments at the top of the file for a few more details. This schedule is simply a "doubling-up" of the
10 team schedule found here where the two-league, one-division each setup is applied to each of two two-division leagues.