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A163793
as a simple table
n
a(n)
1
5
2
57
3
117
4
187
5
251
6
273
7
275
8
665
9
2511
10
40393
11
48615
12
755921
13
970037
[5,57,117,187,251,273,275,665,2511,40393,48615, 755921,970037]