2, the first upkeep. one token being put into play, doubled. so 3 in play.
Next upkeep 1 token being put into play, doubled once, then twice, then three times so 8 for a total of 11 doubling seasons.
next turn 1 token, doubled 11 times, 2^11 = 2048 for a total of 2059
(unless doubling season is additive, but other similar effects aren't. someone else can probably find some rules that back it up)
edit: oh nm there it is in gatherer
"If there are two Doubling Seasons in play, then the number of tokens or counters is four times the original number. If there are three in play, then the number of tokens or counters is eight times the original number."
edit2: the reason why it's this easy is that each doubling season is a replacement effect (affect? :P) so that they are all put into play at the same time, making things clean.
edit 3: oops forgot one in the first step, seems much more ludicrous now
ok, so, I have Opalescence in play, and I enchant Doubling Season with Followed Footsteps. how many token copies will I make?
Millionaires, I hear it's good Music (Disclaimer: lyrics not PG-13) Thanks, CC
Next upkeep 1 token being put into play, doubled once, then twice, then three times so 8 for a total of 11 doubling seasons.
next turn 1 token, doubled 11 times, 2^11 = 2048 for a total of 2059
(unless doubling season is additive, but other similar effects aren't. someone else can probably find some rules that back it up)
edit: oh nm there it is in gatherer
"If there are two Doubling Seasons in play, then the number of tokens or counters is four times the original number. If there are three in play, then the number of tokens or counters is eight times the original number."
edit2: the reason why it's this easy is that each doubling season is a replacement effect (affect? :P) so that they are all put into play at the same time, making things clean.
edit 3: oops forgot one in the first step, seems much more ludicrous now