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A339585
as a simple table
n
a(n)
4
2
5
3
6
5
7
10
8
19
9
40
10
84
11
186
12
412
13
974
14
2277
15
5456
16
13095
[2,3,5,10,19,40,84,186,412,974,2277,5456,13095]