What makes a number interesting or not interesting?
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So Guglielmetti went in search of really boring numbers: those that hardly appear in the OEIS catalog, if at all. The latter is the case, for example, with the number 20,067. As of March, it is the smallest number that does not appear in any of the many stored number sequences. (This is just because the database stores only the first 180 or so characters of a number sequence, however—otherwise, every number would appear in the OEIS’s list of positive integers.) So the value 20,067 seems quite boring. By contrast, there are six entries for the number 20,068, which follows it.
But there is no universal law of boring numbers, and the status of 20,067 can change. Perhaps during the writing of this article, a new sequence has been discovered in which 20,067 appears among the first 180 characters. Nevertheless, the OEIS entries for a given number are suitable as a measure of how interesting that number is.
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