#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

static const ll MOD = 1000000007;

int N;
ll v[100005];
ll dp[100005];

ll memo[320][320];

int main(){
  cin >> N;
  rep(i,N){
    cin >> v[i+1];
  }
  
  dp[1] = 1;

  REP(i,1,N+1){
    REP(j,1,320){
      dp[i] += memo[j][i%j];
      dp[i] %= MOD;
    }
    if(v[i] < 320){
      memo[v[i]][i%v[i]] += dp[i];
      memo[v[i]][i%v[i]] %= MOD;
      if(v[i] != 1){
        dp[i+1] += dp[i];
        dp[i+1] %= MOD;
      }
    }else{
      dp[i+1] += dp[i];
      dp[i+1] %= MOD;

      int p = v[i];
      int j = 1;
      while(p*j<=N){
        dp[i+p*j] += dp[i];
        dp[i+p*j] %= MOD;
        j++;
      }
    }
  }

  cout << dp[N] << endl;
  
  return 0;
}