It depends on the output you want really:  [[21d6sd]]  /r 21d6sd  [[3d6sd]] **|** [[3d6sd]] **|** [[3d6sd]] **|** [[3d6sd]] **|** [[3d6sd]] **|** [[3d6sd]] **|** [[3d6sd]]  However if you want the 7 results sorted in descending order then Aaron has nailed it :(