Petals around the rose

By kristof on Sat, 12/02/2006 - 11:49

The game of petals around the rose took Bill Gates 30 minutes to solve. All I can say is that I solved it way faster, in about three minutes. The game is part of a special kind of guessing games, called Look-and-say sequence. Can you solve the following sequence :

1 11 21 1211 111221 312211 13112221 ...