Not sure of any better way if any to define/describe the given sequence…
But a closer look at numbers ends-up this to be a spacing act on the given digits…
131 517 192 123 ? ===> (Rewrite as TWO digit numbers) ===> 13 15 17 19 21 23 25 27
i.e. Write 131 517 ===> 13 15 17
and 192 123 ===> 19 21 23
So, next terms in the TWO digit sequence would be 25 27 29... And mapping these to original THREE digit form, results in 252, and so on..
25 27 29 ===> 252 729
So, next term of given pattern will be 252.