M=10**9+7
m=512
n=read_line.to_i
a=read_line.split.map(&.to_i)
b=(0...m).map{|i|[0]*i}
dp=[0]*n
dp[0]=1
n.times{|i|
	(1...m).each{|x|dp[i]+=b[x][i% x]}
	if a[i]<m
		b[a[i]][i%a[i]]=(b[a[i]][i%a[i]]+dp[i])%M
	else
		j=i
		while j<n
			j+=a[i]
			dp[j]=(dp[j]+dp[i])%M
		end
	end
	dp[i+1]=(dp[i+1]+dp[i])%M if i+1<n&&a[i]>1
}
p dp[n-1]