I recently looked up the word まんまと in 大辞林. The pitch accent is marked 13. I don't understand what that means, so I decided to look it up in the explanatory notes, which I'll attempt to summarize here (omitting bits about terminology and such):
- Words in Japanese are divided into morae which are pronounced either high or low
- Pitch always changes between the first and second morae
- 大辞林 marks the HLL... pattern with 1
- 大辞林 marks the LHH... pattern with 0
- 大辞林 marks patterns like LHHL with 3 and LHHHL with 4 (indicating the mora directly before the pitch falls)
Unfortunately, I still don't understand. It seems like it should have a single number indicating where the downstep is, or a 0 if there is no downstep, but in this case there are two numbers: 1 and 3. (I assume it's not thirteen because there are only four morae in this word.) I don't see any explanation of what it means when there are two numbers like this.
So, my question is: what is the pitch accent of まんまと, and how can I understand this 13 notation?