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A003497
as a simple table
n
a(n)
0
1
1
8
2
88
3
1216
4
19160
5
327232
6
5896896
7
110393856
8
2126213592
9
41861519680
10
838733719616
[1,8,88,1216,19160,327232,5896896,110393856, 2126213592,41861519680,838733719616]