>>246
#include <stdio.h>

main()
{
int n, m, an, sum;

m = 5;
printf("数列 an = n*n とその和を %d 項目まで表示します\n", m);

n = 1;
sum = 0;
while (n <= m)
{
an = n * n;
sum += an;
printf("a[%d] = %d, sum = %d\n", n, an, sum);
n++;
}
}