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A050537
as a simple table
n
a(n)
1
4
2
6
3
12
4
46
5
72
6
244
7
264
8
544
9
888
10
1146
11
14826
12
24978
13
103386
14
323668
15
458362
16
496422
[4,6,12,46,72,244,264,544,888,1146,14826,24978, 103386,323668,458362,496422]