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A139491 as a simple table

n a(n)
1 3
2 8
3 9
4 12
5 15
6 16
7 21
8 24
9 40
10 45
11 48
12 60
13 72
14 120
15 168
16 240
17 840
18 1848 

[3,8,9,12,15,16,21,24,40,45,48,60,72,120,168,240,
 840,1848]

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Last modified April 24 19:31 EDT 2024. Contains 371962 sequences. (Running on oeis4.)