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A278582
as a simple table
n
a(n)
1
20
2
21
3
24
4
32
5
48
6
64
7
72
8
96
9
100
10
144
11
147
12
199
13
288
14
576
[20,21,24,32,48,64,72,96,100,144,147,199,288,576]
