Question 1197171
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The 0 seems out of place.


If the sequence was 18,16,19,17,20,...
then it appears the pattern <font size=4><b><u>might</u></b></font> be<ul><li>minus 2</li><li>plus 3</li><li>minus 2</li><li>plus 3</li></ul>and so on


If that 0 wasn't there and the pattern was as described, then the next term would be 20-2 = 18


But as you can see, I'm making 2 assumptions about this sequence that may not be true. The nature of questions like this without any context or further instructions make finding the next term purely guess work.


Keep in mind that sequence problems like this are fundamentally flawed. 
Why is that? 
Check out my previous response on <a href = "https://www.algebra.com/algebra/homework/Sequences-and-series/Sequences-and-series.faq.question.1195799.html">this page</a> for more information.
The summary of what I mention is that the sequence 1,2,4 could have infinitely many possible numbers as the fourth term; questions that ask about the next term are often too vague to answer. Further context is needed. 
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