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f = @(n)sum(gcd(n,1:n)<2)
 
f(1)      % 1
f(2)      % 1
f(3)      % 2
f(8)      % 4
f(9)      % 6
f(26)     % 12
f(44)     % 20
f(105)    % 48

Success #stdin #stdout 0.44s 121792KB

stdin

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Standard input is empty

stdout

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f =

@(n) sum (gcd (n, 1:n) < 2)

ans =  1
ans =  1
ans =  2
ans =  4
ans =  6
ans =  12
ans =  20
ans =  48

https://ideone.com/yghvhv

language:

Octave (octave 4.4.1)

created:

visibility:

public

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