Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15026994_3 (director VARCHAR, _number VARCHAR)

### Question ###
Who is the director of the episode at entry number 13? 

### Accurate SQL ###

SELECT director FROM table_15026994_3 WHERE _number = 13