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A349691
as a simple table
n
a(n)
1
1
2
2
3
9
4
176
5
155
6
2450
7
21500
8
118993
9
767700
10
12409639
11
56024339
12
857777653
13
8648737607
[1,2,9,176,155,2450,21500,118993,767700,12409639, 56024339,857777653,8648737607]