N = int(input())

A = list(map(int,input().split()))

lis =  [ [] for i in range(3*(10**5)+1) ]
maxlen = [0] * N

for loop in range(N):

    na = A[loop]

    for i in range(int(na**0.5)+1):

        i += 1
        if na % i == 0:

            for j in lis[i]:
                maxlen[loop] = max(maxlen[loop] , maxlen[j] + 1)

            if na // i != na:
                for j in lis[na//i]:
                    maxlen[loop] = max(maxlen[loop] , maxlen[j] + 1)

    lis[na].append(loop)

#print (maxlen)
print (max(maxlen)+1)