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A038386
as a simple table
n
a(n)
1
1
2
7
3
67
4
734
5
8716
6
109070
7
1416284
8
18903142
9
257718235
10
3573580367
[1,7,67,734,8716,109070,1416284,18903142, 257718235,3573580367]