A097390 Values of ordinal numbers in the following true sentence: "This sentence contains the twentieth, eighth, ninth, nineteenth ... letters of the English alphabet, in order.".

20, 8, 9, 19, 19, 5, 14, 20, 5, 14, 3, 5, 3, 15, 14, 20, 1, 9, 14, 19, 20, 8, 5, 20, 23, 5, 14, 20, 9, 5, 20, 8, 5, 9, 7, 8, 20, 8, 14, 9, 14, 20, 8, 14, 9, 14, 5, 20, 5, 5, 14, 20, 8, 14, 9, 14, 5, 20, 5, 5, 14, 20, 8, 6, 9, 6, 20, 8, 6, 15, 21, 18, 20, 5, 5, 14, 20, 8, 20, 23, 5, 14, 20, 9