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A068184
as a simple table
n
a(n)
0
1
1
1
2
2
3
6
4
38
5
358
6
2589
7
25789
8
257889
9
2578879
10
45578899
[1,1,2,6,38,358,2589,25789,257889,2578879, 45578899]