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A108326
as a simple table
n
a(n)
1
2
2
3
3
6
4
30
5
40
6
86
7
128
8
264
9
639
10
912
11
1932
12
4650
13
5038
14
7410
15
19041
[2,3,6,30,40,86,128,264,639,912,1932,4650,5038, 7410,19041]