import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

THRESH = 200
MOD = 1_000_000_007

def main(A):
    N = len(A)
    memo = [[0] * m for m in range(THRESH)]
    dp = [0] * (N + 1)
    dp[0] = 1
    for i in range(N):
        x = A[i]
        # 小さい mod から受け取る
        for m in range(1, THRESH):
            dp[i] += memo[m][i % m]

        dp[i] %= MOD
        # 直接の移動
        if x > 1:
            dp[i + 1] += dp[i]
        # mod 移動
        if x < THRESH:
            memo[x][i % x] += dp[i]
        else:
            for j in range(i + x, N, x):
                dp[j] += dp[i]
    return dp[N - 1]

A = tuple(map(int, read().split()))[1:]

print(main(A))