n>=3, generate a matrix of nth such that n^2 is the max number, and max number must be in [1,1] or [end, end]. One example will be suggested below:
Example : n=4
10 9 8 7
11 2 1 6
12 3 4 5
13 14 15 16
sum of non-primes
Area of a disk
Matlab Basics - Pick out parts of a vector
BASICS - sum part of vector
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