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A145491
as a simple table
n
a(n)
1
5
2
6
3
14
4
30
5
62
6
90
7
126
8
254
9
510
10
1022
11
2046
12
4094
13
8190
[5,6,14,30,62,90,126,254,510,1022,2046,4094,8190]
