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A109800
as a simple table
n
a(n)
1
2
2
3
3
7
4
9
5
33
6
61
7
93
8
112
9
284
10
615
11
1293
12
2558
13
2925
14
5961
15
6454
16
7960
17
17521
18
40838
[2,3,7,9,33,61,93,112,284,615,1293,2558,2925,5961, 6454,7960,17521,40838]