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A271481
as a simple table
n
a(n)
0
1
1
2
2
4
3
8
4
16
5
32
6
64
7
128
8
256
9
506
10
976
11
1820
12
3278
13
5700
14
9597
[1,2,4,8,16,32,64,128,256,506,976,1820,3278,5700, 9597]