#include <stdio.h>
//課題2
int bn(int n)
{
if(n==1)
return 5;
else
return bn(n-1)+6;
}
int an(int n)
{
if(n==1)
return 2;
else
return an(n-1)+bn(n-1);
}
int main()
{
int n;
return 0;
}
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