Berger Tunnel

You are in Tran Tunnels

Can you answer this question? If you get the correct answer you will earn a coin and allowed to continue your journey through this maze to rescue Goldberg's magic harpsicord?

Don't forget to draw a map of your journey.

What is the mean of these numbers:

2, 18, 5, 15, 6, 14, 10, 1, 19.