Steps :

1. Find out what time the table was dropped using logminer.

2. Restore database to the other location (clone) before the time of table dropped.

from RMAN
- do the clone steps

and finally

run {
set until time "TO_DATE('17-APR-2006:12:26:50','DD-MON-YYYY:hh24:mi:ss')";
restore database;
recover database;
}
alter database open resetlogs;

finally export the table and import it into the production database.