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让我们轻松一下,做一个数字游戏:第一步:取一个自然数n1=4,计算n12+1得a...
让我们轻松一下,做一个数字游戏:第一步:取一个自然数n1=4,计算n12+1得a1;第二步:算出a1的各位数字之和得n2,计算n22+1得a2;第三步:算出a2的各位数字之和得n3,计算n32+1得a3;…依此类推,则a2009的值为( )
A.17
B.26
C.65
D.122
考点分析:
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