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A355630
as a simple table
n
a(n)
2
11
3
37
4
121
5
413
6
1442
7
5047
8
16807
9
58457
10
204085
11
709667
12
2483663
13
8068753
14
30415033
[11,37,121,413,1442,5047,16807,58457,204085, 709667,2483663,8068753,30415033]