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A349101
as a simple table
n
a(n)
1
8
2
33
3
144
4
626
5
2808
6
13422
7
65488
8
326183
9
1650784
10
8444367
11
43629968
12
227105588
13
1190399144
14
6274864076
[8,33,144,626,2808,13422,65488,326183,1650784, 8444367,43629968,227105588,1190399144,6274864076]