Predict the output of the following C program:

#include

int fun(int n){

int i, j, k, sum = 0;

for(i=1;i<=n;i++)

for(j=i;j<=n;j++)

for(k=j;k<=n;k+=2)

sum=sum+k;

return sum; }

int main(){

printf("%d", fun(6));

return 0; }