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A301861
as a simple table
n
a(n)
0
1
1
1
2
2
3
9
4
81
5
783
6
7164
7
69048
8
711009
9
7961040
10
95935761
11
1242436185
12
17235507996
[1,1,2,9,81,783,7164,69048,711009,7961040, 95935761,1242436185,17235507996]