Pingala the Pirate was well known for many things, most notably the urban legend that he had hidden an enormous haul of riches, but also his poor memory, and his clumsiness. He lost a toe on each foot in a bizarre seahorse attack, then lost both his thumbs after trapping them in a door while escaping from a cyclone. It's amazing he lasted long enough to bury his treasure!
Nevertheless, when he died, his body was discovered with a shovel and a note that had the following sequence written on it:
1,1,2,3,11,20,31,111,202,313,1121,2100,3221
Nobody could work out the meaning of the sequence, but after some exhaustive searching, they found the treasure buried 200 paces to the south west of his body
What was the meaning of Pingala's sequence?