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A257028
as a simple table
n
a(n)
1
1
2
4
3
10
4
28
5
49
6
64
7
79
8
109
9
169
10
1270
11
5638
12
6812
13
7951
14
11737
15
16360
16
22840
17
25394
18
33394
[1,4,10,28,49,64,79,109,169,1270,5638,6812,7951, 11737,16360,22840,25394,33394]