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A218889
as a simple table
n
a(n)
1
3
2
8
3
12
4
243
5
729
6
4096
7
65536
8
2097152
9
8388608
10
268435456
11
536870912
12
68719476736
13
274877906944
[3,8,12,243,729,4096,65536,2097152,8388608, 268435456,536870912,68719476736,274877906944]