求如图所示题目程序，要求用到数组解决，谢谢

#include<stdio.h>

int main(){
    int a[20]; //用来存前20个斐波那契数列的值
    int i;
    int sum = 0;

    a[0] = 1;
    a[1] = 1;
    sum = a[0] + a[1];
    for(i = 2;i<20;i++){
        a[i] = a[i-1] + a[i-2];
        sum = sum + a[i]; 
    }
    print("%d",sum);
    return 0
}