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求级数的第N项
Time Limit:1000MS  Memory Limit:32768K

Description:

已知级数的通项公式为: f(1) = 0; f(2) = 2; f(n) = 3f(n-1)+5f(n-2)(n>2)。 对于输入的一些正整数(其值≤16,其个数≤10000),分别求其通项值。当文件读到0时,运行结束。

Sample Input:

3 5 9 0

Sample Output:

6
114
35454
Status  Submit


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