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A078582
as a simple table
n
a(n)
1
1
2
3
3
7
4
13
5
22
6
33
7
48
8
65
9
86
10
110
11
138
12
168
13
204
14
242
15
284
16
330
17
381
18
434
19
493
20
554
[1,3,7,13,22,33,48,65,86,110,138,168,204,242,284, 330,381,434,493,554]