Name  | n | rate
Term1 | 3 | 2.79
Term2 | 4 | 3.00
Term3 | 2 | 2.59

Name  | Seq
Term1 | 1
Term1 | 2
Term1 | 3
Term2 | 1
Term2 | 2
Term2 | 3
Term2 | 4
Term3 | 1
Term3 | 2

function myFunction() {
  var s = SpreadsheetApp.getActiveSpreadsheet().getSheets()[0];
  var target = SpreadsheetApp.getActiveSpreadsheet().getSheets()[1];
  var vals = s.getRange("A2:B").getValues();
  for (var i = 0; i < vals.length; i++) {
    for (var j = 0; j < vals[i][1]; j++) {
      target.appendRow([vals[i][0], j]);
    }
  }
}