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A147481
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
13
6
49
7
332
8
3073
9
36531
10
597879
11
14127501
12
454449581
13
20354788308
14
1267965991925
[1,1,1,1,13,49,332,3073,36531,597879,14127501, 454449581,20354788308,1267965991925]