Question 1088059
<pre><b><font size=4>
{{{matrix(1,15,  

16, "," ,64, "," ,25, "," ,27, "," ,36, "," ,red(" ? "), "," ,49, "," ,1)}}}

Looking at the odd-numbered terms:

{{{matrix(1,15,  

16=4^2,
 ",", "__", "," ,25=5^2, "," ,"__", "," ,36=6^2, "," ,"__", "," ,49=7^2, "," ,"__")}}}

That's an easy pattern of squares.

Looking at the even-numbered terms:

{{{matrix(1,15,  

"__", "," ,64=4^3, "," ,"__", "," ,27=3^3, "," ,"__", "," ,red("?"="?"^"3"), "," ,"__", "," ,1=1^3)}}}

That's an easy pattern of cubes.

So the missing one is {{{red(8=2^3)}}}

Edwin</pre></b></font>