Conway sequence
Generate the the first fifteen numbers. See here for more information: http://en.wikipedia.org/wiki/Look-and-say_sequence
submatch(
1 11 21 1211 111221 312211 13112221 1113213211 31131211131221 13211311123113112211 11131221133112132113212221 3113112221232112111312211312113211 1321132132111213122112311311222113111221131221 11131221131211131231121113112221121321132132211331222113112211 311311222113111231131112132112311321322112111312211312111322212311322113212221