I don't see any numerical relationships, or consistent pattern, but I note that all the numbers are less than 26, so perhaps they are the position of letters of the alphabet: O K B E S H I A O (anagram of HE IS A BOOK, for example). These could be the initial letters of something meaningful to you or they could be a code. There are also 9 of them, which may indicate a complete set of 9, rather than a series. If there had been 7, for example, I would have thought of the days of the week (I've actually seen this one); or, another example, if there had been 12, the months of the year.