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A004135
as a simple table
n
a(n)
1
1
2
2
3
3
4
6
5
11
6
19
7
28
8
40
9
56
10
72
11
96
12
114
13
147
14
178
15
183
16
252
17
255
[1,2,3,6,11,19,28,40,56,72,96,114,147,178,183,252, 255]