#include <stdio.h>
//練習問題F
int func(int n) {
int sum,i,a=-1;
sum=a;
for(i=1;i<=n; i++){
sum= 3*a+5;
a= sum;
}
return sum;
}
int main(void){
int n=3;
printf("数列anについて, n=%dのときの値は%d\n", n
, func
(n
)); return 0;
}
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