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A159215
as a simple table
n
a(n)
3
3480
4
37772
5
213728
6
864276
7
4577552
8
19067804
9
73644648
10
370791068
11
1692340016
12
7824640020
[3480,37772,213728,864276,4577552,19067804, 73644648,370791068,1692340016,7824640020]