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A057704
as a simple table
n
a(n)
1
2
2
3
3
5
4
6
5
13
6
24
7
66
8
68
9
167
10
287
11
310
12
352
13
564
14
590
15
620
16
849
17
1552
18
1849
19
67132
20
85586
21
234725
[2,3,5,6,13,24,66,68,167,287,310,352,564,590,620, 849,1552,1849,67132,85586,234725]