Generate the following vector：
elseif n=2 then
q=[2 2 1];
elseif n=3 then
q=[3 3 3 2 2 1];
Did I do it right?
regexp hacks are not cool. Please disallow them in the Test Suite.
Make a checkerboard matrix
Sum all integers from 1 to 2^n
Replicate elements in vectors
Find the repeating elements and repetitions of a row vector.
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