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A238116
as a simple table
n
a(n)
1
1
2
14
3
162
4
1966
5
25567
6
351880
7
5056350
8
75100735
9
1144833705
10
17821104101
[1,14,162,1966,25567,351880,5056350,75100735, 1144833705,17821104101]