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A287429
as a simple table
n
a(n)
1
3
2
11
3
129
4
1343
5
12743
6
113255
7
964655
8
8003679
9
65375807
10
529172223
[3,11,129,1343,12743,113255,964655,8003679, 65375807,529172223]