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A154072
as a simple table
n
a(n)
4
20
5
60
6
123
7
304
8
180
9
208
10
509
11
248
12
136
13
220
14
132
15
58
16
42
17
78
[20,60,123,304,180,208,509,248,136,220,132,58,42, 78]