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

public class Main {
    static final int MOD = 1000000007;
    static final int LIMIT = 300;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int[] values = new int[n];
        for (int i = 0; i < n; i++) {
            values[i] = sc.nextInt();
        }
        int[] dp = new int[n + 1];
        dp[0] = 1;
        int[][] sums = new int[LIMIT][LIMIT];
        for (int i = 0; i < n; i++) {
            for (int j = 1; j < LIMIT; j++) {
                dp[i] += sums[j][i % j];
                dp[i] %= MOD;
            }
            if (values[i] < LIMIT) {
                sums[values[i]][i % values[i]] += dp[i];
                sums[values[i]][i % values[i]] %= MOD;
            } else {
                for (int j = 1; i + j * values[i] < n; j++) {
                    dp[i + j * values[i]] += dp[i];
                    dp[i + j * values[i]] %= MOD;
                }
            }
            if (values[i] > 1) {
                dp[i + 1] += dp[i];
                dp[i + 1] %= MOD;
            }
        }
        System.out.println(dp[n - 1]);
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}