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A182169
as a simple table
n
a(n)
1
1
2
2
3
7
4
19
5
358
6
3845
7
31138
8
36461
9
4286729
10
81945545
11
2059172170
12
3071920146
13
9331669953
14
19026491086
[1,2,7,19,358,3845,31138,36461,4286729,81945545, 2059172170,3071920146,9331669953,19026491086]