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A369108
as a simple table
n
a(n)
1
2
2
15
3
123
4
1074
5
9623
6
87882
7
814183
8
7618317
9
71838469
10
681591775
11
6499182987
[2,15,123,1074,9623,87882,814183,7618317,71838469, 681591775,6499182987]