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A093452
as a simple table
n
a(n)
1
2
2
3
3
4
4
6
5
7
6
8
7
10
8
15
9
21
10
24
11
36
12
49
13
51
14
86
15
116
16
134
17
176
18
284
19
345
20
498
21
544
22
649
[2,3,4,6,7,8,10,15,21,24,36,49,51,86,116,134,176, 284,345,498,544,649]