10 11 12 13 14 15 16 17 20 22
24 ? 100 121 10000

Please tell me the next number in this sequence and why? I have the answer can't figure this out.

Thanks for the help!!

See here:

The On-Line Encyclopedia of Integer Sequences (http://www.research.att.com/~njas/sequences/?q=10%2C+11%2C+12%2C+13%2C+14%2C+15%2C+16%2C+17%2C +20%2C+22&sort=0&fmt=0&language=english&go=Search)

Think base 3