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A256823
as a simple table
n
a(n)
1
4
2
7
3
9
4
11
5
27
6
40
7
63
8
80
9
120
10
173
11
227
12
358
13
445
14
525
15
767
16
1164
17
2180
18
5368
19
7898
[4,7,9,11,27,40,63,80,120,173,227,358,445,525,767, 1164,2180,5368,7898]