Another riddle

People call me genuious and so the answer is: 1 11 21 1211 111221 312211 13112221 1113213211 31131211131221 HOW: It's actually quite simple:) After starting the sequence with 1, each term in the sequence consists of groups of two numbers based on the previous term - the first being the quantity and the second specifying which digit. Example: the first term is 1, which has "one 1" in it, therefore 11. 11 has "two 1's" in it, therefore 21. 21 has "one 2 and one 1" in it and therefore 1211.