Backup archive between 2 sequence number - oracle database script

--- For taking backup of archivelog between seq number 1000 to 1050  RMAN> backup format '/archive/%d_%s_%p_%c_%t.arc.bkp'  archivelog from sequence 1000 until sequence 1050;  -- For RAC ,need to mention the thread number also  RMAN> backup format '/archive/%d_%s_%p_%c_%t.arc.bkp'  archivelog from sequence 1000 until sequence 1050 thread 2;