朱莉娅代码：
seed = 1234
N = 2
newNum = Int64[]
for i in 1:N
seq = digits(seed*seed, pad=8)
seed = seq[6]*1000+seq[5]*100+seq[4]*10+seq[3]
newNum[i] = seed
end
newNum[2]
错误： https: //i.stack.imgur.com/3p390.png
