CREATE TABLE table_name_13 (_number___county VARCHAR(255), mascot VARCHAR(255), ihsaa_class VARCHAR(255), enrollment VARCHAR(255))
what is the #/county that is ihsaa class aaa, has enrollment higher than 611 and the dragons is the mascot?
    
SQL: SELECT _number___county FROM table_name_13 WHERE ihsaa_class = "aaa" AND enrollment > 611 AND mascot = "dragons"