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_name_20 ( attendance VARCHAR, opponents VARCHAR, h___a VARCHAR )

### Question ###
What was the Attendance when Lincoln City was the Opponents with H/A of A?

### Accurate SQL ###

SELECT COUNT(attendance) FROM table_name_20 WHERE opponents = "lincoln city" AND h___a = "a"