M=10**9+7
m=512
n=read_line.to_i
a=read_line.split.map(&.to_i)
b=(0...m).map{|i|[0i64]*i}
dp=[0i64]*n
dp[0]=1
n.times{|i|
	(1...m).each{|x|dp[i]+=b[x][i% x]%=M}
	if a[i]<m
		b[a[i]][i%a[i]]+=dp[i]%=M
	else
		(i+a[i]).step(to:n-1,by:a[i]){|j|dp[j]+=dp[i]%=M}
	end
	dp[i+1]+=dp[i]%=M if i+1<n&&a[i]>1
}
p dp[-1]%M