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A057297
as a simple table
n
a(n)
1
1
2
2
3
6
4
38
5
722
6
874
7
1102
8
5934
9
13718
10
19342
11
260642
12
379794
13
438254
14
809362
15
1234806
16
4952198
[1,2,6,38,722,874,1102,5934,13718,19342,260642, 379794,438254,809362,1234806,4952198]