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A145604
as a simple table
n
a(n)
1
1
2
3
3
6
4
13
5
17
6
28
7
40
8
59
9
74
10
104
11
137
12
171
13
216
14
284
15
349
16
428
17
524
18
652
19
790
[1,3,6,13,17,28,40,59,74,104,137,171,216,284,349, 428,524,652,790]