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A377161
as a simple table
n
a(n)
11
8
12
38
13
637
14
9759
15
86221819
16
28522360751
17
583791967829
18
1801511107253
19
6467456149881773
[8,38,637,9759,86221819,28522360751,583791967829, 1801511107253,6467456149881773]