N=int(input())
A=[int(i) for i in input().split()]
maxA=max(A)
div=[[] for i in range(maxA+1)]
for i in range(1,maxA+1):
    for j in range(i,maxA+1,i):
        div[j].append(i)
B=[[] for i in range(maxA+1)]
dp=[0 for i in range(N)]
for i in range(N):
    #dp[i] i番目が最後であるような列のmax
    dp[i]=max(dp[i],1)
    for d in div[A[i]]:
        for j in B[d]:
            dp[i]=max(dp[i],dp[j]+1)
    B[A[i]].append(i)
print(max(dp))