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A132177
as a simple table
n
a(n)
1
1
2
5
3
11
4
23
5
48
6
97
7
196
8
393
9
787
10
1576
11
3153
12
6308
13
12617
14
25235
15
50472
16
100945
17
201892
18
403785
[1,5,11,23,48,97,196,393,787,1576,3153,6308,12617, 25235,50472,100945,201892,403785]