import java.util.*;
import java.io.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        int[] arr = new int[n + 1];
        String[] line = br.readLine().split(" ", n);
        for (int i = 1; i <= n; i++) {
            arr[i] = Integer.parseInt(line[i - 1]);
        }
        int[] dp = new int[n + 1];
        dp[1] = 1;
        int[][] adds = new int[11][];
        for (int i = 1; i <= 10; i++) {
            adds[i] = new int[i];
        }
        for (int i = 1; i < n; i++) {
            for (int j = 1; j <= 10; j++) {
                dp[i] += adds[j][i % j];
                dp[i] %= MOD;
            }
            if (arr[i] == 1) {
                adds[1][0] += dp[i];
                adds[1][0] %= MOD;
            } else if (arr[i] <= 10) {
                dp[i + 1] += dp[i];
                dp[i + 1] %= MOD;
                adds[arr[i]][i % arr[i]] += dp[i];
                adds[arr[i]][i % arr[i]] %= MOD;
            } else {
                dp[i + 1] += dp[i];
                dp[i + 1] %= MOD;
                for (int j = 1; i + j * arr[i] <= n; j++) {
                    dp[i + j * arr[i]] += dp[i];
                    dp[i + j * arr[i]] %= MOD;
                }
            }
        }
        for (int i = 1; i <= 10; i++) {
            dp[n] += adds[i][n % i];
            dp[n] %= MOD;
        }
        System.out.println(dp[n]);
    }
}