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A235874
as a simple table
n
a(n)
1
11
2
37
3
1657
4
1847
5
74687
6
322193
7
5051341
8
11938853
9
245333213
10
397597169
11
130272314657
12
1273135176871
[11,37,1657,1847,74687,322193,5051341,11938853, 245333213,397597169,130272314657,1273135176871]